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The Effect of LED Lamp Beads on the Display

The configuration form of LED in the application depends on many factors, including LED parameters and quantity, input voltage, efficiency, heat dissipation management, size and layout restrictions and optics, etc. The simplest configuration form is a single LED. Because planes are usually required for actual application occasions, multiple LEDs need to be arranged and combined as needed to meet the application requirements of large -scale, higher brightness, dynamic display, color transformation, and the matching requirements of LED and supporting drivers. 1. Overall form of series 1. Simple series form: Generally, the LED1 LEDN in the form of simple series connection form is connected to the end, and the current flowing through the LED is equal. For LEDs with the same specifications and batches, although the voltage on a single LED may have a small difference, because the LED is an current device, it can ensure that their luminous intensity is consistent. Therefore, the simple series of LEDs have the characteristics of simple circuits and convenient connections and other characteristics. (Disadvantages: Due to the use of series, when one of the LED fails, the entire LED lights will be extinguished, which will affect the reliability of use. ) 2. Twilight forms of combined Qina diode: Each LED is connected with an improved series connection form of a Qiner diode. In this connection method, the breakdown voltage of each Zina diode is higher than the working voltage of the LED. When working normally, because the Qina diode VD1 VDN does not drive, the current mainly flows through the LED1 LEDN. When the damaged LED in the LED string is caused In addition to the LED, other LEDs still have currents passing and glowing. WeChat public account: Shenzhen LED Chamber of Commerce (this connection method and simple series form have greatly improved reliability in terms of reliability. ) Second, overall parallel form 1. Simple parallel form: Simple and connected LED1 LEDN head tail parallel, each LED is equal to the same voltage of each LED. It can be seen from the characteristics of LED. It belongs to a current device, and the slight changes in the voltage added to the LED will cause a large change in the current. In addition, due to the limitations of LED manufacturing technology, even the same batch of LEDs, there are differences in performance. Therefore, when LED1 LEDN works, the current flowing through each LED is not equal. It can be seen that the uneven distribution of each LED current may cause the LED life of the current to be too large, and even burn out. (Disadvantages: Although this connection method is relatively simple, but the reliability is not high, especially for applications in the case of large number of LEDs. ) 2. Independent matching parallel form: For the reliability issues in simple parallel, the parallel form of independent matching is a good way. Each LED in this way has a current adjustable (drive Voutput terminal is L1 Ln) to ensure that the current flowing through each LED is within the range of its requirements, with good driving effects, a single LED protection Complete, do not affect other LED work when faults, and can match the characteristics of LEDs with large differences. (Disadvantages: The composition of the entire driver circuit is relatively complicated, the cost of the device is high, the volume occupies too much, it is not suitable for the large number of LED circuits. ) Third, the mixed form of mixed formation is proposed by integrating the respective advantages of series and parallel forms. The main forms are the following two. 1. The form of mixed connecting first: When the number of LED applications is large, simple series or parallel connection is unrealistic, because the former requires the driver to output a high voltage (N times of a single LED voltage VF), and the latter requires that the latter requires Drive output a large current (N times of a single LED current IF). This brings difficulties to the design and manufacturing of the driver, and also involves the structural problems and overall efficiency of the drive circuit. The voltage of the number of LEDs in series and the working voltage of a single LED VF determines the output voltage of the driving device; The value determines the output power of the driver. Therefore, the mixing method after mixing is mainly to ensure that there is a certain reliability (the LED fault in each string only affects the normal light of the string), and the matching of the drive circuit ), It improves reliability than simple series forms. WeChat public account: Shenzhen LED Chamber of Commerce (the entire circuit has the characteristics of relatively simple structure, convenient connection, high efficiency, etc., suitable for applications with a large number of LEDs. ) 2, first combined with a string of mixed connection: Several LEDs first combined with a string of mixed connecting forms. Since LED1-N LEDM-N is first connected to connect, which improves the reliability of each group of LEDs, but this is important. For this reason, you can choose the working voltage and current as much as possible as a parallel group by pairing, or to solve the small current resistance of each LED. (The other characteristics of this mixed formation form and the existing problems are similar. ) Fourth, cross array form: The form of cross array is mainly to improve the reliability of LED work and reduce the failure rate. The main form of composition is: each series of 3 LEDs as a group, and the VA, VB, and VC output terminals that are connected to the drive output of the drive. When the 3 LEDs of a series are normal, the 3 LEDs are glowing at the same time; once one or two LEDs are invalidated, it can ensure that at least one LED work normally. In this way, it can greatly improve the reliability of each group of LD light, and it can improve the overall reliability of the entire LED glow. Summary: Different connection forms have their own different characteristics, and the requirements for the driver are different, especially when a single LED fails to fail the circuit work, the overall lighting reliability, the ability to ensure the overall LED as much as possible, the ability to continue to work as much as possible, the ability to continue to work, It is particularly important to reduce the overall LED failure efficiency, etc. Zhuhai Co., Ltd. is a professional LED lamp bead manufacturer with a number of national patents. The main products include purple light LED, infrared LED lamp beads, ultraviolet LED lamp beads, color LED lamp beads, etc. High temperature resistance, high power. We have 16 years of LED patch experience. The monthly production capacity is about 60 million PCS, and the annual output is about 500 million PCS. It integrates R & D, production and sales. All in all, LED group applications are an important way for LED actual applications. Different LED connections are essential for large -scale LEDs and design requirements for driving circuits. Therefore, in the combination of actual circuits, the correct selection of the compatible LED connection method is of positive significance for improving the effect of its luminous effect, the reliability of the work, the convenience of the driver design and manufacturing, and the efficiency of the entire circuit.

The Effect of LED Lamp Beads on the Display 1

Author: Tianhui-Air Disinfection

Author: Tianhui-UV Led manufacturers

Author: Tianhui-UV water disinfection

Author: Tianhui-UV LED Solution

Author: Tianhui-UV Led diode

Author: Tianhui-UV Led diodes manufacturers

Author: Tianhui-UV Led module

Author: Tianhui-UV LED Printing System

Author: Tianhui-UV LED mosquito trap

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Except for The Disinfection Applications, UV LEDs Are Also Popular In The UV LED Printing System Industry
Except for The Disinfection Applications, UV LEDs Are Also Popular In The UV LED Printing System Industry
The Coronavirus outbreak has significantly disrupted society's ability to function normally and people's daily lives by making them fearful of being touched by microorganisms. Deep ultraviolet lamp diode disinfection technology was created in response to the increasingly severe environmental pollution. It has achieved significant advances in disinfecting and has a wide range of potential applications. Due to its benefits of compact size, power consumption and low, environmentally friendly nature, and quick lighting, UVC LED ultraviolet devices have emerged as the best-selling items for disinfection and sterilization throughout the epidemic. The UV light business, together with the UV LED Printing Systemindustry, has all seen opportunities for change and improvement as a result of the expansion of the UVC LED market. The introduction of LED UV light curative technology in 2008 at the German Drupa Print Equipment and Technology Exhibition was remarkable and received a lot of attention from suppliers of UV LED Printing Systemequipment and services. The future of trying cures in the UV LED Printing Systemindustry will be dominated by LED UV light technology, according to industry experts who have given this technology excellent marks. What connection does UV LED technology have to the UV LED Printing System sector? When questioned about UV LED Printing Systemtechnology, most people will mention household printers or duplicate shops. These printer types, however, only represent a small portion of the UV LED Printing Systemtechnologies available today and the applications they can be used for. All printed materials—from newspapers to wallpaper packing to bottle labels—require particular UV LED Printing Systemprocedures. What feature do all of these techniques share? UV drying is the process of curing ultraviolet (UV) radiation. With this technique, UV LED Printing Systemcan continue while the ink is drying. Please be advised that UV is not frequently utilized for home UV LED Printing Systemsince inks are dried using still heat. Instead, the primary applications for UV drying are in commercial and industrial printing. Involving UV light in the UV LED Printing Systemcan be done in several ways. Light-emitting diodes, or simply LEDs, have seen the fastest technological growth during the past few years. If the UV Led printing systemprocedure is carried out in a series of steps, UV LEDs can either be positioned after the ink has been applied to the surface or in intermediate locations. In contrast to conventional UV light bulbs, UV LED luminescence is produced when electrons pass through a semiconductor (diode) that emits energy in the form of protons. The type of materials used in the semiconductor determines the light emission and, thus, the precise wavelength. The chemical mechanism involved in curing inks with ultraviolet radiation is intricate. Using a photoinitiator is based on crosslinking, which hardens ink by forming new links within oligomers. A material known as a photoinitiator reacts to wavelengths and causes a chemical process in which some bonds are destroyed, and others are created. Then, a stiff three-dimensional network is created by these new bonds. Led Ultraviolet Inks For Retail Food Packaging: Benefits One of the print industry's fastest-growing segments is the use of UV-LED inks for a range of general applications, such as posters, catalogs, and brochures. Although still very new, UV LED systemcolors for packaged foods are becoming more and more well-liked. 1) Complete Food Safety Compliance Customer safety must be ensured in all food manufacturing and processing processes. Standard UV inks must adhere to safety and migration standards for direct packaging. Minimal migration LED-UV inks are suitable for use in many high-end food packaging applications since they are made to minimize the entry of ink components into foods. 2) Exceptional Versatility When using LED-UV inks, a greater level of curing is crucial, especially when creating a variety of food-safe packaging without additional labels. Given that print may be applied directly to container materials like meal tubs, cylinder or cylindrical cups, and PET bottles, LED-UV ink prices are more affordable. 3) A Practical Way To Reduce Costs Overall, LED-UV inks are quick to set up and have a low waste rate. Combined with flexographic or digital printability, they make it possible to define a specific print run length, lowering waste and providing a more accurate sense of cost. Presses using LED-UV technology are less expensive to run and maintain since they have fewer moving components requiring routine maintenance and greater lamp life. As a result, compared to other UV LED Printing Systemmethods, the return on investment (ROI) is greater and occurs more quickly. 4)Dependability Because of their reputation for dependability and speed, flexo and inkjet applications are frequently chosen. Food packaging UV LED Printing Systemwith LED-UV Inks supports this idea since it produces the most dependable low- and high-volume UV LED Printing Systemtechnique, even when done quickly. Flexographic machines are especially well-suited to LED-UV inks in print situations where speed is crucial because they produce a high-quality output for packaged foods that ooze luxury and excellence. 5) An Ecologically Sound Approach With a lower power requirement during curing, no smog emissions, and a 20% reduction in ink use, the UV-LED drying process is significantly more eco-friendly than alternative drying techniques. Your company's carbon impact will also be less, which will help you market your brand as eco-friendly while lowering energy costs. Where to buy your UV LED UV LED Printing System from? You must depend on reliable UV Led manufacturers for an easy and reliable packaging startup. If you are on the hunt for one, surely you are on the right platform. UVLED light beads, UVLED panels, and UVLED Customized solutions (UVC, UVB, and UVA full range of UVLED goods) are all available from Tianhui, a supplier of UV LED solutions. https://www.tianhui-led.com/uv-led-system.html The application includes the following business uses: Deep ocean bacteriostasis of the UV water disinfection; flowing water sterilization of the UV water disinfection; air disinfection; Air Disinfection conditioning sterilization; UVC LED sterilization. UVB LED: Skincare, calcium supplements for physiotherapy, and plant development. UVA LED: Banknote going to count and verification, criminal anti-counterfeiting investigations, medical detection, mosquito and insect traps, jade and jewelry detection, exposure machines, curing of industrial glue, curing of prints, curing of spray paint, curing of paint, curing of optical fibers, 3D printing, lithography, etc.
Application Research Of UV LED In Sterilization And Disinfection-Water Purification
Application Research Of UV LED In Sterilization And Disinfection-Water Purification
UV-LEDs, or ultraviolet light-emitting diodes, have become a practical technique for disinfecting water over the past ten years. The advantages of traditional mercury UV lamps over chemical UV water disinfectiontechniques are still there with UV-LEDs, but they also do away with some drawbacks. The Sterilization Technology Numerous applications of UV LED Sterilization technology can be found in daily life. For instance, it is utilized in food, medicine, water, and sewage systems. Chemicals, heat, UV radiation, and ozone are all frequently used UV LED Sterilizationtechniques. Due to their simplicity, chemicals (such as chlorine, peroxidase, etc.) are frequently employed for UV LED Sterilization; however, they may have unfavorable effects, such as changing the target's quality. The disadvantage of using chlorine for UV LED Sterilization is the production of odorous and biohazardous chemicals. Water cannot retain ultraviolet and has little impact on the ecosystem. Additionally, it does not result in bacterial antibiotic resistance. Thus, UV LED Sterilization, which has recently appeared in the spotlight as a chlorination alternative, effectively cleans without chemical compounds. UV lamps, such as relatively low and moderate mercury-vapor lamps, are used in traditional UV sterilizing techniques. These are used in biological labs and medical facilities to disinfect work environments and equipment. Regarding the efficiency of UV absorption by DNA, UV lights emit UV at a specific wavelength, which very closely matches the peaks of the anti-microbial efficacy curve. UV radiation with a frequency of 365 nm is categorized as UV-A (320-400 nm), and UV-A has less potential for damage than UV-C (100-280 nm). A UV-LED produces light with a wavelength of 365 nanometers, which is less harmful to human eyes and skin than a lamp with a 254-nanometer wavelength. Additionally, because UV-LED is mercury-free, it has no negative effects on the environment or people. An environmentally aware sterilizer is a UV-LED. Mercury, which is harmful to the environment and human health, is present in mercury-vapor lamps. UV sterilizers must be made to fit the shape of lamps, which are often huge and occupy a lot of room. Thus, without using hazardous materials, new UV LED Sterilizationequipment with low energy consumption can be created in various shapes and sizes. Comparison Of UV LED With Conventional LED; S UV-LEDs are more resilient, smaller, and mercury-free than their conventional counterparts. They also last longer and achieve full power more quickly. These benefits, with almost immediate startup times and customizable wavelengths, provide UV-LED reactor designs with great design flexibility. Despite these benefits, conventional UV-LED reactor applications have concentrated on smaller networks, which are ineffective for treating municipal water. Due to their modest size, which ranges from 1 to 4 mm, UV-LEDs can be positioned to emit radiation in various directions. Compared to conventional UV lamps, these highly focused radiation patterns allow for more orientation options and hence, unique fission reactors. For UV water disinfection, UV-LEDs have shown to be at least as effective as reduced UV (LPUV) lamps over a broad spectrum of anti-microbial frequencies (e.g., 250–285 nm). These variables are improving year after year. The widespread adoption of UV-LED proper sanitation technology has been constrained by high upfront costs, poor output power, and low facade efficiency. As a result, the usage of the technology has primarily been limited to point-of-use, small-scale batch applications, where the shortcomings of the technology are overcome by prolonged exposure periods to achieve the necessary UV dose. Nevertheless, the creation of the first full-scale UV-LED reactors that may be used at municipal water works (WTWs) has been made possible by the rapid advancements in UV-LED technology and the optimization of reactors' design and performance. Such reactors are made of a crystal glass tube with UV-LEDs arranged in a series along the cylinder's edge, which allows UV light to enter the water flowing through the reactor. Thermal control is accomplished by dissipating the heat produced by the operating LEDs using a fluid circulation system surrounding the reactor vessel. Biodosimetry To determine if UV-LEDs can be used for large-scale UV water disinfection,a precise assessment of the UV water disinfectionefficiency of full-scale reactors is required. Biodosimetry is the current validation method for conventional UV reactors (using mercury lamps) In this context, the evaluation of a surrogate test microorganism's sensitivity to UV exposure over various doses with calibrated activation kinetics is called biodosimetry. The dose-response curve for UV reactors is typically determined through collimated beam testing using the test water's microorganism. A reduced relative dose (RED) (mJ/cm2) is computed using the calibrated curve and the measured deactivation of the biodosimeter. UV Dose-Response Curve For The Reactors The challenged organism should be grown similarly from the same stock of microorganisms. A UV dose-response curve for the reactors is produced as a result of the operation, and it shows the reduction dosage for each log inactivation attained at full scale. Additionally, the approach includes UV transmittance (UVT) in the UV dose calculation, standardizing the reactor's UV dose-response curves to various indicative water quality levels based purely on UVT. Therefore, the primary goal of this work was to determine the UV-LED system's performance by utilizing substitute test microorganisms and comparing it to that of traditional UV lamps. Cryptosporidium spp chose Cryptosporidium spp. as our targeted organism since UV is frequently applied in situations with a greater probability of Cryptosporidium incidence. Risk factors for Cryptosporidium include their presence in source waters, resistance to chlorine (reported chlorine contact durations of 1000–10,000 mg min/L), and propensity to evade drinking filtered water due to their small size (4–6 m). The inactivation UV treatment for Cryptosporidium parvum is 0.16 cm2/MJ, which is considerably less than the corresponding constant for free chlorine. Where Can You Buy Your UV LED UV LED Sterilization From? We surely have you covered if you are looking for reliable UV Led manufacturers. Zhuhai Tianhui Electronic Co., Ltd.,one of the top UV LED producers, specializes in UV LED air decontamination, UV LED water UV LED Sterilization, UV Led printing systems and curing, uv led diode, uv led module, and other goods. https://www.tianhui-led.com/sterilization-module.html It has a skilled R&D and sales team to offer consumers UV LED Solutions, and its goods have also won the praise of many customers. With a complete production run, consistent quality and dependability, and affordable costs, Tianhui Electronics has been working in the UV LED package market.
LED High -power Lamp Bead Lighting Is Not just as Simple As Glowing
LED High -power Lamp Bead Lighting Is Not just as Simple As Glowing
From the perspective of design, talk about LED high -power lamp design, and from the perspective of architecture, LED high -power lamp bead lighting, which may be the angle of many engineers chose. What if we have to talk deeper? Is there any angle to make us pour? "Strictly speaking, what we design is not LED high -power lamp beads, but the brightness of the LED high -power lamp beads in different facades in each space. "When we discuss the lighting plan, we have a lot of sexuality about the degree of nature of observation, but this is just the surface that knows it, and you must know why. miss. Too many mystery hidden, maybe it will make you suddenly cheerful, and suddenly realize. Last time we talked about the formulation of the standard value of LED high -power lamp beads based on visual perceptual validity, so this time we take a look, what kind of relationship between those different LED high -power lamp beads, for In terms of LED high -power lamp bead lighting design, why is there a "ethical" existence? Let's take a look at the relationship between Darkness and Mingming: When this should be and dark, when people suddenly enter the dark in a bright environment for a long time, there is no seeing anything at first. After a period of time, the visual sensitivity Only then gradually increased, and it can gradually see objects in the dark. This phenomenon is called dark. Author: Tianhui-Air Disinfection Author: Tianhui-UV Led manufacturers Author: Tianhui-UV water disinfection Author: Tianhui-UV LED Solution Author: Tianhui-UV Led diode Author: Tianhui-UV Led diodes manufacturers Author: Tianhui-UV Led module Author: Tianhui-UV LED Printing System Author: Tianhui-UV LED mosquito trap
[Application] the Application of UVLED Curing Device on Smart Watches
[Application] the Application of UVLED Curing Device on Smart Watches
With the continuous listing and update of smart devices, smart watches are now occupying our daily life quickly, especially children's watches can grasp the position of children in real time and communicate with children at any time. The guardian is actually the most basic requirement for children's smart watches. In the production process of this product, the UVLED curing device plays a very important role. The camera in the children's watch will click a lap of UV glue to play a good protective role. After the glue, the UVLED curing device will be solidified. The UVLED curing equipment produced by our company is simple, energy saving and environmental protection. Tianhui Technology Development Co., Ltd. specializes in the development, production, sales and technical services of UVLED curing equipment, and is a professional UVLED light source manufacturer. Since the establishment of the company, Tianhui Technology, which has excellent employees, attaches great importance to the investment in technology research and development, tailor -made high -quality, efficient and energy -saving UVLED light sources for customers. Customers provide stable and efficient products. Author: Tianhui-Air Disinfection Author: Tianhui-UV Led manufacturers Author: Tianhui-UV water disinfection Author: Tianhui-UV LED Solution Author: Tianhui-UV Led diode Author: Tianhui-UV Led diodes manufacturers Author: Tianhui-UV Led module Author: Tianhui-UV LED Printing System Author: Tianhui-UV LED mosquito trap
[Speed] UVLED Glue Curing Speed
[Speed] UVLED Glue Curing Speed
As customers often call to consult UVLED glue curing machines, some customers also mention that the speed of curing is fast enough. However, there are two aspects of the factors that affect UVLED glue curing: 1. CICF: Depending on substrate, coating, curing interval, etc., appropriate adjustment of the device curing speed. The speed of curing is too fast, and it is prone to the appearance of the base material UVLED glue sticking or drying the appearance; if the operating speed is slow, the appearance of the substrate will be aging. 2. UVLED glue coating: The thickness of UVLED glue coating plays a vital role in the solidification of UVLED. The coating is too thick, and the time is relatively long under the illumination of the same power light source. On the one hand, it affects the curing of UVLED glue. On the other hand, it will make the appearance of the substrate's appearance too high, which will cause the product's appearance differential glory difference. In fact, the curing rate of UVLED glue, the final curing depth and the drying effect are related to the factors such as ultraviolet light sources, lighting time, and material light transmission. It is recommended to determine the specific solidification time through the test. Our company's UVLED glue curing machine has three bands: 365, 395, and 405 UVLED curing machines, and the irradiation power is different. The adjustable power irradiation intensity can be contacted. There is a one that can meet your requirements. Author: Tianhui-Air Disinfection Author: Tianhui-UV Led manufacturers Author: Tianhui-UV water disinfection Author: Tianhui-UV LED Solution Author: Tianhui-UV Led diode Author: Tianhui-UV Led diodes manufacturers Author: Tianhui-UV Led module Author: Tianhui-UV LED Printing System Author: Tianhui-UV LED mosquito trap
[UV Energy] the Effect of UVLED Energy on the Effect of Curing
[UV Energy] the Effect of UVLED Energy on the Effect of Curing
UVLED solidification, the main condition is that the molecular absorption of light quantum with sufficient energy becomes a stimulus molecule, decomposes into free radicals or ions, so that unsaturated organic objects are used for aggregation, branches, cross -linking and other chemical reactions, so as to achieve the purpose of solidification. 1. The UVLED energy required by the Knowing Optical Discovering agent is to ensure thorough solidification, the energy scientific and reasonable energy provided by the supply is normal than the energy it needs. 2. I do not know the UVLED energy required by the light caused by the light cause, and the supply is the supply blindly. Methods not only waste energy, but also cause negative effects of excessive solidification, such as explosion gathering, anti -aggressive reactions, etc. 3. When UVLED is insufficient, the energy of UVLED must be moderate, that is, it cannot be excessive or insufficient. 4. Compared with traditional mercury lamps and halogen lights, UVLED belongs to the one -wavelength ultraviolet rays. The wavelength width is small. It is generally about 5nm in the positive and negative 5nm. Choose the UVLED wavelength that matches the light cause. 5. In the process of curing, the optical cause needs to be completely solidified at one time. If the ultraviolet energy is too small, the solidification effect is not good. It is recommended to adjust the UVLED curing energy again. UVLED's curing time, etc. For more uvled information, please contact Tianhui! Author: Tianhui-Air Disinfection Author: Tianhui-UV Led manufacturers Author: Tianhui-UV water disinfection Author: Tianhui-UV LED Solution Author: Tianhui-UV Led diode Author: Tianhui-UV Led diodes manufacturers Author: Tianhui-UV Led module Author: Tianhui-UV LED Printing System Author: Tianhui-UV LED mosquito trap
[UV Curing Equipment] Tianhuavled Curing Device Helps People Be More Beautiful
[UV Curing Equipment] Tianhuavled Curing Device Helps People Be More Beautiful
Recently, many customers consult TIANHUI's UV printing technology and equipment in the field of cosmetics technology. In fact, in the printing carton printing of cosmetics and smoke bags, single paper adhesive printers occupy an absolute advantage. At present, multi -unit light units have become the most basic composition of single paper adhesive printers. Through it, it can easily complete the light of special effects, and this requires UVLED curing equipment. Some special materials are often used in cosmetics packaging: metal cardboard, composite card paper and aluminum jet paper, and the use of light -processed cardboard, which is widely used in the field of makeup crystal packaging, showing that it is more and more widely used, showing the momentum of continuous and stable growth. The new transparent composite materials have also begun to be used on plastic box packaging. Since these printed materials cannot be printed in general methods, they must achieve the expected results through UV technology. The use of equipment is also more common. According to this trend, UV printing will become a standard configuration in the future, which can fully meet the special requirements of the cosmetics industry. Tianhui is a professional company focusing on UVLED curing machines. I hope to cooperate and win a win -win situation with customers and partners in the UVLED field to create a better future. Author: Tianhui-Air Disinfection Author: Tianhui-UV Led manufacturers Author: Tianhui-UV water disinfection Author: Tianhui-UV LED Solution Author: Tianhui-UV Led diode Author: Tianhui-UV Led diodes manufacturers Author: Tianhui-UV Led module Author: Tianhui-UV LED Printing System Author: Tianhui-UV LED mosquito trap
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