发布时间:2025-02-04 22:08:40
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。
浇灌楼板请各位专业人士详细讲一下布筋和混凝土配制比例及浇灌的注意事项
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