第二个调节形式自动断路器均衡三极与两极也同样均衡。

A second regulator form of automatic breakers balanced on 3 poles and two poles also equally balanced.

youdao

第二个调节形式自动断路器均衡三极与两极也同样均衡。

A second regulator form of automatic breakers balanced on 3 poles and two poles also equally balanced.

youdao