只有在每柱每相上安装过电压保护器才能得到好的保护效果。

Only in each column over-voltage protector installed on each phase can get good protection effect.

youdao

只有在每柱每相上安装过电压保护器才能得到好的保护效果。

Only in each column over-voltage protector installed on each phase can get good protection effect.

youdao