发布时间:2025-02-04 22:13:26
开关不带电合闸时,用万用表电阻档测量空气开关对应的输入、输出端,电阻为零;开关不带电分闸时,用万用表电阻档测量空气开关对应的输入、输出端,电阻接近于无穷大。那就说明空气开关是好的。
您好想问问您金丝胡桃木金丝檀木非洲黄金木红花檀木赤金檀木这三种木材比较
2025-02-04 22:13:26 2025-02-04 22:13:26我想年低之前从河北高碑店买一套三居室的房子不知道都哪里有卖的
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