主体材料采用高强度可锻铸铁，热镀锌防锈。

It's action is insulation protection. The body made of high-intensity malleable iron, hot-dip galvanized.

youdao

主体材料采用高强度可锻铸铁，热镀锌防锈。

It's action is insulation protection. The body made of high-intensity malleable iron, hot-dip galvanized.

youdao