发布时间:2025-01-29 18:56:36
A相.B相.C相.互为380伏....每一相跟N零为220伏交流电..N零...在电网中多重接地..
什么叫单极开关?什么叫双极开关?什么有叫三极开关?
开关一相就叫单极开关.
.开关相,,零就叫双极开关..
开关三相就叫
三极开关
..
收房前多久找装修公司比较合适 找装修公司的最佳时间是什么时候
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