国产一级黄色_A一级黄色片_免费一级毛片_中国国产一级--高清视频_在线观看欧美视频_成人A毛片免费视频观看_国产一级毛片A午夜一级毛片_多人性激烈的欧美三级视频_国产一级做A爰片久久毛片_国产一区视频在线观看

What is the motherboard power charger, the motherboard power charger is divided according to the design circuit operating frequency, can be divided into power frequency machine and high frequency machine, the power frequency machine is designed by the traditional analog circuit principle, the machine internal power device (such as transformer , inductance, capacitors, etc.) are large, generally there is less noise when the load is larger, but the model has strong resistance to resistance in harsh grid environment conditions, reliability and stability are higher than high frequency machine Strong.