发布时间:2025-01-30 02:26:21
这是正常现象,机器里边有小风扇,就像电脑里的散热器一样,起到某些零件散热的作用,不用担心没事的
漏电保护器如果不接入电路中单独拿出来合上开关按下测试按钮能跳闸么
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