中文字幕无线码,内射老阿姨1区2区3区4区,99国产欧美久久久精品,内射人妻无码色AV麻豆

The power supply is a device that provides electrical energy and plays a key role in the products and devices that are required to supply power. At present, there are few well-known brands of power supplies, and most cheap and inferior power supplies are flooding the market. What are the consequences of poor quality power?

  1, because of the lack of power, resulting in the total overload of the power supply, making the power supply life shortened;

  2, did not play a protective effect on the product, easy to burn out the equipment;

  3, because to ensure low prices, so the capacitor resistance can be cheaper and cheaper, repair rate is high;

  4, to deal with harsh electricity environment, the power of the power supply to resist wide voltage, frequent bad power.