摘要：这款充电器使用了30年,几年前终于寿终正寝。我打开它,看看内部什么地方有问题。结果,故障纯粹是由于机械原因。我一定摔过它,因为铜PCB（印刷电路板）已经从绝缘安装座上脱落,并与外
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Journal of Systems Science and Complexity Chinese Optics Letters Advances in Atmospheric Sciences Chinese Annals of Mathematics,Series B Chinese Physics C Science China Mathematics Nuclear Science and Techniques Research in Astronomy and Astrophysics Journal of Systems Engineering and Electronics Transactions of Nonferrous Metals Society of China Chinese Annals of Mathematics Series B Chinese Physics B