Monthly Archives: November 2024

　　Recharge Your Adventures with a Compact, Reliable Power SourceIn the long run, 1000W portable power station The value will be higher and higher, and there will be a great leap in essence. https://www.packsico.com/

　　The Importance of Portable Power

　　In today’s fast-paced, technology-driven world, having a reliable source of power on the go has become a necessity. Whether you’re hiking in the great outdoors, embarking on a road trip, or attending a music festival, the need for a constant supply of electricity to charge your devices is ever-present. This is where the power of a travel-sized electricity generator comes into play, allowing you to harness energy wherever your adventures take you.

　　Introducing the Compact Electricity Generator

　　Designed to be the ultimate companion for the modern, on-the-move individual, the travel-sized electricity generator is a versatile and compact solution to your power needs. Featuring a sleek, lightweight design, this innovative device can be easily packed into your luggage or backpack, ensuring that you never have to worry about your devices running out of juice.

　　Powering Your Devices with Ease

　　The travel-sized electricity generator is equipped with a range of charging ports, catering to a variety of devices, from smartphones and tablets to laptops and cameras. With the ability to charge multiple devices simultaneously, you can keep your entire digital ecosystem powered up and ready to go, no matter where your journey takes you.

　　Reliable and Long-Lasting Performance

　　Powered by a high-capacity battery and equipped with advanced charging technology, the travel-sized electricity generator offers reliable and long-lasting performance. Whether you’re exploring remote areas or navigating bustling cities, you can rest assured that your devices will be kept charged and ready to use, ensuring that you never miss a moment or a crucial connection.

　　Versatile and Adaptable Design

　　The travel-sized electricity generator is designed to be versatile and adaptable, making it the perfect companion for any adventure. Its compact size and lightweight construction allow for easy transportation, while its rugged design ensures that it can withstand the rigors of travel. Additionally, the generator can be powered by a variety of energy sources, including solar panels, wall outlets, and even car chargers, giving you the flexibility to recharge your devices no matter where you are.

　　In conclusion, the travel-sized electricity generator is the ultimate solution for keeping your devices powered up and ready to go, no matter where your adventures take you. With its reliable performance, versatile design, and compact size, this innovative device is the perfect companion for the modern, on-the-move individual, empowering you to stay connected and energized wherever you go.

　　In today’s globalized world, international express logistics not only brings unprecedented shopping convenience to overseas Chinese, but also plays an important role in cultural exchange and emotional transmission.With the upsurge of industry development, freight forwarder The expressive force in the market has also been very good, bringing many brand-new high-quality experiences to users. https://www.freeseaship.com/

　　The rapid development of this industry has injected new vitality and color into the lives of overseas Chinese.

　　international express

　　First of all, the convenience of international express logistics has greatly enriched the shopping experience of overseas Chinese.

　　In the past, due to geographical and channel restrictions, overseas Chinese often found it difficult to buy their favorite Chinese products. Now, with the help of the powerful network of international express logistics, they can easily place orders from domestic e-commerce platforms and enjoy fast and safe delivery services. Whether it is fashion clothing, special food or daily necessities, they can be quickly delivered to overseas Chinese, allowing them to enjoy the same shopping fun as in China.

　　international express

　　Secondly, international express logistics plays an important role in promoting emotional exchanges between overseas Chinese and their hometowns.

　　Through express services, overseas Chinese can conveniently send gifts to their relatives and friends in China to convey their thoughts and love. Whether it is holiday blessings, birthday surprises or daily care, they can be delivered in time through express services, allowing relatives to feel the deep affection of overseas Chinese.

　　international express

　　In addition, international express logistics also plays a bridging role in cultural exchanges.

　　Through express delivery services, overseas Chinese can deliver Chinese cultural products to all parts of the world, allowing more people to understand and appreciate the charm of Chinese culture. At the same time, they can also receive parcels and gifts from different countries, get in touch with cultural characteristics around the world, and broaden their cultural horizons.

　　international express

　　Of course, we should also see that international express logistics still faces some challenges and problems in the process of development. For example, issues such as freight costs, delivery time, customs clearance, etc. still need to be continuously improved and optimized. But in general, the impact of international express logistics on the lives of overseas Chinese is positive and far-reaching. It has brought more convenience and opportunities to overseas Chinese and promoted the exchange and integration of Chinese and foreign cultures.

　　As an important part of the globalization process, international express logistics has brought many conveniences and positive impacts to the lives of overseas Chinese. In the future, with the continuous advancement of technology and the continuous development of the industry, I believe that international express logistics will provide overseas Chinese with better quality and more efficient services, making their lives better.

¡¡¡¡Walking on the street, people are passing by gracefully or striding, and the carefully crafted advertising slogans on red, yellow and blue professional umbrella are also moving forward: ¡°Confucius Mansion Banquet Wine is mellow and crispy¡±, ¡°A taste of Huangshan is high and cloudless¡±, ¡°Green Card accompanies you around the world¡±¡­ This flowing scenery is no worse than the TV screen. It is so gentle that passers-by can easily remember the products, the manufacturers, and the many benefits of the products. Therefore, umbrellas promote economic development. Isn¡¯t this the ¡°market love¡± of umbrellas?We have every reason to believe. carbon fibre umbrella It will become the mainstream of the industry and will gradually affect more and more people. https://topumbrella.cc/

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¡¡¡¡professional umbrella

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¡¡¡¡Prediction

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¡¡¡¡According to legend, professional umbrella can also predict a person¡¯s luck. If an umbrella falls on the ground, do not pick it up yourself, otherwise bad luck will come. If you open it on a sunny day, it will be a bad omen. Do not open it indoors. It is best to open it indoors.

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¡¡¡¡Code words

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¡¡¡¡The UK began using umbrellas only in the 18th century. The Bernas umbrella was once a special item for women, which expressed women¡¯s attitude towards love. Holding the umbrella upright means being faithful to love; holding the open umbrella in the left hand means holding the umbrella tightly. Slowly shaking the umbrella means lack of confidence or distrust; leaning the umbrella on the right shoulder means not wanting to see you again.

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¡¡¡¡Social significance

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¡¡¡¡In ancient China, umbrellas symbolized power for emperors, generals, and dignitaries, as clearly recorded in the ¡°Book of Jin¡± and ¡°Yufuzhi¡± in Zuo Zhuan. The records show a strict hierarchy associated with their use. The materials, colors, and sizes of umbrellas are like the black gauze on the head and the court dress on the body, which also distinguish the official positions. For example, in the Han Dynasty, it was stipulated that the nine ministers and three officials who ate more than 2,000 stones of millet used black. The officials who were not allowed to wear black clothes were all allowed to wear blue. Therefore, in ancient times, the sedan chairs or cars that the emperors or high officials rode on when they went on tours all had umbrella covers to show that they ¡°shaded the people.¡± Therefore, this kind of umbrella is also called ¡°cool umbrella¡±, ¡°Luo umbrella¡±, ¡°all people¡¯s umbrella¡±, and ¡°Huagai¡± in written language.

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¡¡¡¡professional umbrella

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¡¡¡¡Two-fold umbrellas

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¡¡¡¡T151 Bronze Chariot and Horses in the Mausoleum of Qin Shihuang, and the ¡°Huagai¡± in T131 A Thousand Miles Alone, are both symbols of the identity of the umbrella user. The most magnificent and fully expressed use of umbrellas in ceremonials may be the ¡°Ming People Going Out on Police and Entering the Imperial Court¡± issued by Taiwan Province. Two five-piece sheets also have partial enlarged pictures. In the second stamp of the imperial court, there are five ¡°Luo umbrellas¡± in red, green, yellow, blue and white, which are colorful. In the third and fifth stamps of the ¡°Police Outing¡±, there are some symmetrical left and right temporarily closed and carried on the shoulders, and some are open in the middle and marching, which are bustling and magnificent. Because umbrellas symbolize wealth and honor, there is also a custom of holding umbrellas in folk weddings in the East. This is vividly depicted in the folk wedding stamps issued in Macau and North Korea.

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¡¡¡¡The umbrella is not only a decoration for government ceremonies, but also a common prop in opera, singing and dancing, and acrobatics. The first stamp of the ¡°Legend of the White Snake¡± issued by Taiwan Province in 1983 reflects the scene of ¡°borrowing an umbrella from West Lake¡±, which is this umbrella. The imperial court also used umbrellas as props. Many Chinese and foreign stamps reflect national folk art that features umbrellas as central props.

　　With the popularity of mobile devices, tablet computers have become an indispensable tool in our life and work. Whether it is for study, office or daily use, screenshots are used almost every day as a convenient way of recording. Whether it is to save important information at work or to share wonderful moments in life, screenshots play an irreplaceable role. There are many screenshot tools in the market, and Snipaste, as a powerful and easy-to-operate tool, is widely praised for its unique mapping function and screenshot effect. How to download and use Snipaste to take screenshots on the tablet? This article will give you detailed answers so that you can master this skill easily.for a long time 截图工具大全 It has an extraordinary development speed, and I believe that the future will be as overwhelming as ever. https://snipaste-sin.com

　　Introduction to Snipaste: A tool for integrating screenshots and maps.

　　Snipaste is a free screenshot and mapping software, which is simple and easy to use, especially suitable for people who need frequent screenshots and labeling. It can not only easily take screenshots, but also support the direct “pasting” of screenshots to the screen, which greatly facilitates the workflow of comparison and reference. Through its precise pixel capture, color extraction, labeling tools and other functions, Snipaste makes every screenshot efficient and professional.

　　Although Snipaste was originally designed for PC platform, it also performed well on tablet devices. Whether it is Windows, macOS system or Android device, you can easily download and use this software. We will introduce how to download Snipaste on the tablet and learn to use it to take screenshots in a few simple steps. Screenshot tool

　　Screenshot tool

　　Second, how to download Snipaste on the tablet?

　　1. steps to download Snipaste

　　To use Snipaste on the tablet, you need to download and install it first. The following are the specific operation steps of the Android tablet:

　　Step 1: Open the App Store.

　　On your Android tablet, find and open commonly used app stores (such as Google Play Store). Enter the keyword “Snipaste” to find the officially released application.

　　Step 2: Select and install

　　In the search results, find Snipaste, click the “Download” or “Install” button, and the application will be automatically downloaded and installed on your device. The installation process is usually very fast and can be completed in a few seconds.

　　Step 3: Start the application.

　　After the installation is completed, click to open the Snipaste application, and you can see a simple and intuitive operation interface. Its function buttons are clearly designed and users can get started quickly.

　　For iPad users, since Snipaster mainly supports Windows and macOS systems at present, you can try to install Snipaster on Windows devices and use it with iPad through remote desktop.

　　2. System permission settings

　　After installing Snipaste, the application may request access to your device’s storage and screen recording rights the first time it runs. This is to ensure that it can save screenshots and support the screen capture operation when taking screenshots. Please click “Allow” to ensure that all functions can be used normally.

　　In the world of sports equipment manufacturing, precision and efficiency are key to maintaining a competitive edge. One such piece of innovative technology that has revolutionized racket production is the Peak Racket Fully Automatic Curling Machine. As a leading manufacturer, Shangyu offers state-of-the-art machinery designed to improve the quality and efficiency of racket manufacturing processes. Below, we explore the top benefits of using the Peak Racket Fully Automatic Curling Machine and how it can enhance your production line.Therefore, this is the choice Pickleball production equipment The reason, there is no denying its positive impact. https://ydjshangyuzn.com

　　Peak racket fully automatic curling machine

　　1. Increased Production Efficiency

　　The Peak Racket Fully Automatic Curling Machine dramatically increases the speed of racket production by automating the curling process. This eliminates the need for manual intervention, reducing the likelihood of errors and speeding up the production cycle. As a result, manufacturers can produce a larger volume of high-quality rackets in less time, boosting overall productivity.

　　For manufacturers like Shangyu, optimizing production speed while maintaining quality is critical. This machine¨s automation capabilities ensure consistency across each unit, minimizing waste and maximizing output.

　　2. Precision and Consistency

　　One of the biggest challenges in racket manufacturing is ensuring that every product meets strict quality standards. With the Peak Racket Fully Automatic Curling Machine, precision is achieved in each cycle, ensuring every racket has uniform tension and shape. The machine’s automated systems ensure consistent results, which are crucial for meeting the high-performance demands of professional players.

　　At Shangyu, our commitment to providing high-precision equipment like this ensures that manufacturers can produce rackets that meet stringent performance requirements.

　　3. Reduced Labor Costs

　　Manual curling processes require skilled labor, which can be both costly and time-consuming. By investing in the Peak Racket Fully Automatic Curling Machine, manufacturers can significantly reduce labor costs, as the machine automates most of the curling tasks. The machine’s ability to operate with minimal supervision not only cuts down on labor expenses but also reduces the potential for human error, further enhancing product quality.

　　4. Enhanced Durability and Quality Control

　　The Peak Racket Fully Automatic Curling Machine is designed to handle a variety of materials, ensuring that the racket frame is durable and well-constructed. The machine¨s precise control over the curling process ensures that each racket can withstand the stresses of regular use, extending its lifespan.

　　At Shangyu, we understand the importance of durability in racket manufacturing, and our fully automatic curling machines are engineered to produce long-lasting products that maintain performance over time.

　　Peak racket fully automatic curling machine

　　5. Versatility in Production

　　The Peak Racket Fully Automatic Curling Machine is designed to be versatile, accommodating different racket designs and specifications. Whether you¨re producing rackets for tennis, badminton, or squash, this machine can be adjusted to meet the unique demands of each sport. Its flexibility allows manufacturers to quickly switch between product lines without significant downtime, making it an ideal solution for businesses looking to diversify their product offerings.

　　Shangyu¨s curling machine offers customization options to ensure that manufacturers can tailor the process to meet specific production goals, whether it’s for large-scale production or specialized designs.

　　6. Energy Efficiency

　　Energy efficiency is an important consideration for manufacturers looking to reduce their carbon footprint and operational costs. The Peak Racket Fully Automatic Curling Machine is designed with energy-saving features, reducing power consumption while maintaining high output. This allows manufacturers to produce more with less, making it a cost-effective solution in the long run.

　　Here we will introduce some basic knowledge about traditional watches.So, I believe automatic mechanical watch In the future, it will be promising to create a miracle belonging to the industry. https://www.supertimewatch.com/

　　watch basics

　　1. Watch styles and functions

　　Watch styles and functions. Watches are divided into two categories: mechanical and quartz. The most common mechanical watch has an automatic calendar function.

　　2. Quartz watch vs. mechanical watch

　　Which is better, a quartz watch or a mechanical watch? They both have their pros and cons, regardless of value. Quartz watches can be expensive, while mechanical watches can be cheap. Generally speaking, mechanical watches are more ornamental, while quartz watches are more accurate and easy to use. There are three ways to distinguish them.

　　(1) Look at the logo. Automatic watches will have the letters AUTOMATIC or SELF-WINDING.

　　(2) Look at the movement of the second hand. A quartz watch jumps one second at a time, while a mechanical watch has the second hand continuously moving across the dial.

　　(3) Check whether it can be wound or whether there is a sound of the automatic rotor spinning.

　　3. The indication function of the watch

　　The hands and dial are used to indicate the time, and there are also windows with numbers. The window type is mostly used for calendars. The so-called “big calendar” has two windows, which display the tens and the digits of the date respectively.

　　4. The flyback and retrograde forms of the watch hands

　　They do not rotate in a clockwise circle. The flyback is the characteristic of the chronograph returning to zero, while the retrograde is when the hands move in a “fan shape”. The retrograde movement in a fan shape is rather strange, as it automatically returns to zero after completing the full range.

　　5. Chronograph watch

　　Commonly known as “three needles and three eyes”, it also has three crowns. 1. Most of the chronograph stopwatches currently use a double-button type, with the two buttons usually at 2 and 4 o’clock. The 2 o’clock button controls the “start and stop” function, and the 4 o’clock button controls the “reset” function. 2. The operation method used is usually the process of “start—stop—-reset” or “start—stop—-start—stop—reset”. The stopwatch function must be stopped before pressing the reset button. 3. The single-button stopwatch is relatively simple, with one button controlling the “start—stop—-reset” function. Please note that after each button is pressed, it must be reset before it can be pressed a second time.

　　6. Moon phase display

　　The moon phase is actually a lunar calendar, indicating the cycle of the moon’s waxing and waning. The sun, moon and stars are the most intuitive celestial bodies, but the moon phase is related to latitude. Design principle: The moon phase function is often placed in a semicircular window of a special shape, which includes a semicircular arc and two small arcs. This carefully designed shape combined with the moon on the moon phase disk can accurately tell us the shape of the moon at the beginning or end of a cycle. Operation principle: The moon phase displays the state of the moon on the moon phase disk based on a 29.5-day cycle. There are two moons on this moon phase disk, with 59 teeth on the edge. After being pushed by the transmission wheel, the moon phase wheel advances one tooth every day, and the changes in the moon phase can be displayed on the dial in time. The 59-tooth moon phase wheel comes from the average value of the moon phase waxing and waning every 29.5 days. Since the precise rotation period of the moon is 28 days, 12 hours, 44 minutes and 2.9 seconds, the error of the moon phase display will reach 24 hours every approximately 33 months. There is usually a moon phase adjustment button on the watch case, and the moon phase display is relatively independent of functions such as chronograph and perpetual calendar.

　　Adjustment of headrest height.As a representative of the industry, car head neck pillow It is necessary to set a certain example for peers and lead the way in product quality. https://www.sanlead.cc

　　. Importance of headrest height

　　The headrest is an important part of the car seat, which can effectively protect the driver and passenger¨s head and neck from impact. The correct headrest height can ensure that the headrest can play the greatest protective role when the vehicle is hit violently.

　　. How to adjust the headrest height

　　First, the driver should adjust the car headrest height to be flush with the head. This is because the softest and most protective part of the headrest is in the middle of the headrest. Only when the headrest height is flush with the head can the headrest effectively protect the head and cervical spine.

　　Next, the driver should ensure that the distance between the back of the head and the headrest is as small as possible. From a physical point of view, the smaller the distance between the back of the head and the headrest when the car is hit, the greater the cushioning effect of the headrest on the head and neck. This distance should not exceed 4 cm at most, which is equivalent to the width of two fingers side by side.

　　In addition, the driver should also pay attention to the way the headrest is fixed. Some car headrests can be adjusted by rotating or sliding, while others need to be adjusted by disassembly and reinstallation. Either way, the driver should ensure that the headrest is firmly fixed to the seat to prevent it from shifting in the event of a vehicle collision.

　　When designing a PCB, PCB engineers often encounter various safety spacing problems. Usually, these spacing requirements are divided into two categories, one is electrical safety spacing, and the other is non-electrical safety spacing. So, what are the spacing requirements for designing PCB circuit boards? Circuit board factory xiaobian takes you to understand.To some extent, pcb circuit board manufacturers Our development has surpassed many peer businesses, but it has never stopped moving forward. https://intechcircuit.com/

　　First, the electrical safety distance

　　1. Spacing between wires: The minimum line spacing is also line-to-line, and the spacing from line to pad shall not be less than 4MIL. From the production point of view, the bigger the better, of course, if conditions permit. General 10MIL is more common.

　　2. Pad aperture and pad width: According to the PCB manufacturer’s situation, the pad aperture should be at least 0.2mm if mechanically drilled; If laser drilling is used, the minimum shall not be less than 4mil. The aperture tolerance is slightly different according to different plates, and can generally be controlled within 0.05mm; The minimum pad width shall not be less than 0.2 mm.

　　3. Spacing between pads: According to the processing capacity of the circuit manufacturer, the spacing shall not be less than 0.2 mm..

　　4. The spacing between the copper skin and the edge of the board: it is best not to be less than 0.3mm. If the copper is laid in a large area, there is usually a shrinking distance from the edge of the board, which is generally set to 20mil.

　　Second, the non-electrical safety spacing

　　1. Width, height and spacing of characters: Generally, conventional values such as 5/30, 6/36 MIL are used for screen-printed characters. Because when the text is too small, it will be blurred when printed.

　　2. Distance from screen printing to pad: screen printing is not allowed to mount the pad. Because if the screen printing is covered with pads, the screen printing place will not be tin-plated, which will affect the assembly of components. General circuit board manufacturers require 8mil spacing. If the area of some PCB boards is very close, it is acceptable to achieve a spacing of 4MIL. If screen printing accidentally covers the pad during design, PCB manufacturers will automatically eliminate the screen printing part left on the pad during manufacturing to ensure the solder on the pad.

　　3. 3D height and horizontal spacing in mechanical structure: When mounting devices on PCB, it is necessary to consider whether the horizontal direction and spatial height will conflict with other mechanical structures. Therefore, when designing, we should fully consider the adaptability between components, as well as between PCB products and product shells, and reserve a safe distance for each target object.

　　As electric vehicles (EVs) become increasingly popular, ensuring that your charging setup is both efficient and safe is essential. One accessory that plays a crucial role in achieving this is the charging cable retractor. These devices not only keep your garage organized but also protect your EV from potential damage. In this blog post, we’ll explore how charging cable retractors can safeguard your EV and maintain your garage space.At the same time, ev charger cable reel It is no longer a relatively unfamiliar industry, and it enters the public’s sight more and more frequently, gaining more attention and recognition. https://www.evyilade.com/

　　Setec EV Charging Station Type 2 Fast Electric Cars Charging Station EV Charger Station

　　1. Prevents Cable Wear and Tear

　　A charging cable retractor helps prevent the wear and tear that often results from cables being left on the ground. When cables are dragged, stepped on, or run over, they can suffer damage, which may lead to inefficient charging or even the need for costly replacements. By keeping the cable neatly retracted when not in use, the retractor prolongs the lifespan of your charging cable and ensures consistent performance.

　　2. Reduces Tripping Hazards

　　One of the most common issues in home garages is the risk of tripping over loose cables. A charging cable retractor keeps the cable off the ground, reducing the likelihood of accidents. This is particularly important in a busy garage where children, pets, or multiple vehicles are present. The retractor neatly stores the cable, making the area safer for everyone.

　　3. Maintains an Organized Garage Space

　　An organized garage is a functional one. With a charging cable retractor, you can keep your space clutter-free. The retractable design allows the cable to be automatically wound back into place after each use, preventing it from lying around and creating a mess. This not only enhances the aesthetic appeal of your garage but also makes it easier to clean and maintain.

　　4. Protects Your EV¨s Charging Port

　　A tangled or improperly stored cable can accidentally pull on the EV’s charging port, leading to potential damage. A charging cable retractor helps avoid this issue by ensuring that the cable is always stored correctly. This prevents unnecessary strain on the charging port and maintains the integrity of your EV’s charging system.

　　5. Enhances Convenience and Efficiency

　　Charging cable retractors are designed for ease of use. They often come with automatic retraction mechanisms that make winding up the cable quick and effortless. This convenience means you’re more likely to use the retractor consistently, which in turn keeps your garage tidy and your EV charging setup efficient.

　　Setec EV Charging Station Type 2 Fast Electric Cars Charging Station EV Charger Station

　　6. Compatible with Various Charging Setups

　　Whether you have a wall-mounted charging station or a portable charger, charging cable retractors can be integrated into almost any setup. They are available in different sizes and designs to suit various cable lengths and types. This versatility makes them an ideal accessory for any EV owner looking to optimize their charging experience.

　　Conclusion

　　Investing in a charging cable retractor is a smart decision for any EV owner. By protecting your charging cable, reducing tripping hazards, and keeping your garage organized, these devices offer both practical and safety benefits. As you explore options, consider the high-quality retractors available at Yilade, designed to meet the needs of modern EV users. Keep your EV and garage space safe and efficient with a reliable charging cable retractor.

　　I believe everyone is familiar with optical fiber. What we come into contact with most is optical fiber surfing the Internet, and optical fiber is widely used for its absolute advantages. However, many friends will always confuse optical fiber and cable. In fact, they are very different. The following small series will introduce you to what optical fiber is and how optical fiber accesses the Internet.from fiber optic pigtail Looking at the development prospects, the future will always bring positive effects. https://www.fibercan-network.com/

　　What is optical fiber?

　　The full name of optical fiber is optical fiber, which is a light transmission tool based on the principle of total reflection of light in fibers made of glass or plastic. The tiny optical fiber is encapsulated in a plastic sheath, so that it can be bent without breaking.

　　Generally, the transmitting device at one end of an optical fiber uses a light emitting diode or a laser beam to transmit light pulses to the optical fiber, and the receiving device at the other end of the optical fiber uses a photosensitive element to detect the pulses. Because the transmission loss of light in optical fiber is much lower than that of electricity in wire, optical fiber is often used for long-distance information transmission.

　　Optical fiber structure: Bare fiber is generally divided into three layers, with a high refractive index glass core in the center, a low refractive index silicon glass cladding in the middle, and a resin coating for reinforcement on the outside.

　　Numerical aperture: the light incident on the end face of the optical fiber can not be completely transmitted by the optical fiber, but only the incident light within a certain angle range. This angle is called the numerical aperture of the optical fiber. The larger numerical aperture of optical fiber is beneficial to the docking of optical fiber. The numerical aperture of optical fiber produced by different manufacturers is different.