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

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。

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

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。

youdao