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1 引言 随着科学技术的发展,人们对生活的质量以及信息的依赖程度都提出了较高的要求,人们在生活和工作中使用的电气及电子设备数量大
1 Introduction With the development of science and technology, people have put forward higher requirements on the quality of life and the dependence on information. The large number of electrical and electronic equipment used by people in life and work