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Microphone application and purchase

General use cases, such as short distances (within 20, 30 meters), used in conference rooms, multi-function halls and other occasions, when the moving range is not large, you can choose a wireless microphone type with quartz oscillation and a single receiver, and the microphone head can choose to move Coil,  wireless microphone for sale  electret and other types, if conditions permit, phase-locked loop wireless microphones can also be selected. In performing arts bars, theaters and other occasions, due to the large range of activities, complex receiving conditions and high requirements, it is recommended to use PLL type and diversity type wireless microphones. If there are special requirements, musical instrument microphones, chorus microphones, etc. can also be used. In high-demand occasions such as large theaters and studios, it is recommended to use a well-known brand diversity wireless system with PLL receiving technology. In these occasions, the number of microphones is large, the
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Plastic classification of plastic mold injection molding

According to the molecular structure and characteristics of synthetic resins,  plastic molding size   it is divided into thermoplastics and thermosetting plastics. Thermoplastics: The molecular structure of synthetic resins in these types of plastics is linear or branched. Thermoset Plastics: The molecular structure of the resin in this type of plastic is ultimately a bulk structure. It has a linear structure at the beginning of heating. Therefore, it has plasticity and solubility, and can be molded into plastic parts of a certain shape. When the heating is continued, chemical bonds (ie cross-linking) are formed between the main chains of the linear molecules, and the molecules become network-like structures. It does not melt and does not melt, and the shape of the plastic part is fixed and will not change. like： Dimensions of plastic parts and their accuracy  What are the factors that affect the size of plastic molding Solution to dimensional deviation in plastic molding 
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How to use laser hair growth cap

What is the effect of using a laser hair growth cap? Can you grow hair by irradiating the scalp with a laser?  loss hair   At first glance, it may not seem very reliable, but this therapy does have certain effects and can be used as a means of adjuvant therapy. Physical therapy has almost no side effects. At present, there are two kinds of drugs approved by the US FDA to treat hair loss, which are well-known minoxidil and finasteride. There is also a physical therapy that is actually helpful for the treatment of hair loss, that is, laser hair growth. The principle of laser hair growth: Simply put, laser hair growth stimulates the scalp through a fixed wavelength of laser light, enhances the activity of hair follicle cells, and achieves the effect of promoting hair growth. The domestic and foreign guidelines for the diagnosis and treatment of male alopecia also include laser hair growth, but only as an auxiliary treatment method, and laser hair growth with minoxidil is indeed better tha
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How to find the right injection molding manufacturer

In recent years, more and more industries have entered the real industry. So finding a reliable injection molding factory to mass-produce the product becomes the core priority. So, how should we choose a high-quality and reliable  injection moulding machine  factory? 1. Professional ability First of all, we must conduct a 360-degree inspection of the injection molding factory to see if it is a one-stop injection molding factory, and whether it has the ability to provide one-stop service from mold design and manufacturing, product injection processing, plastic shell surface treatment (fuel injection, silk screen, etc.) Serve. 2. Service capability There is no need to say more about this. The service of the injection molding factory is not only pre-sale, in-sale, and after-sale. It is not just whether the delivery can be made on time, but more importantly, it is necessary to perceive the needs of customers in advance, and be able to do the work in the front, so as to avoid problems. If y
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How to choose the hospital elevator installation?

1. Do not blindly pursue low prices. If you pursue low prices, the configuration and usage of the elevator you choose will not be good, no matter what brand you choose. Because the operation of the hospital requires the normal operation of the elevator and the cost of elevator use and maintenance. Therefore, it is important to be applicable when purchasing  Hospital Elevator . 2. When purchasing elevators, you should not only consider the brand. The main thing is to first understand the status quo of elevator technology and the changes in elevator brands. When choosing an elevator, you can consider your own grade and choose an elevator with a configuration that is more suitable for you. 3. Quiet, the special environment of the hospital determines that the elevator operation sound should be as small as possible. After the machine room is canceled in the machine room-less elevator, the noise caused by the main engine brakes, fans, etc. can only be concentrated in the hoistway, so the noi
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Advantages of using DOB drivers?

Advantages of using DOB drivers? dob led   Has the following advantages: Ultra-thin and ultra-light, saving transportation costs; Fully automatic SMT, saving labor costs and reducing defective product rate; Over-temperature protection, IC chip and LED are on the same PCB, prolonging the life of LED; Almost no electrolytic capacitor components are used, which is more stable and reduces costs; Instant on, faster than traditional lights; Now in the LED field, the trend is to be simpler, more compact and more economical. Under this trend, IC solutions emerge as the times require, and the DOB technology market is growing by more than 200% annually.   like: About DOB and some misunderstandings in understanding What is DOB technology? What is the principle? The manufacturing principle of DOB light board 
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How to choose an injection mold processing factory

In the development of a new plastic product, if mass production is required, injection mold opening is a recommended cost-effective solution, plastic injection molding service ,  but how to choose an injection mold processing factory? 1. Find the corresponding manufacturer according to the size of the order: There are many injection mold processing manufacturers, but they are not the same. Therefore, you need to find the manufacturer according to the size of your order. 2. Choose a more professional injection mold processing factory: Although the processing methods of injection mold processing manufacturers are similar, they all have certain tendencies. We should try to choose a more professional injection mold processing factory according to our own industry attributes. 3. Choose an injection mold processing factory with better after-sales service: After the product is processed and produced, various problems will definitely occur during use. Of course, some of them are not due to p
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