所有阀门的表面都严重腐蚀了。

The surface of all the valves are corroded seriously.

youdao

这就意味着只有阀门轴的前端面可以作为检测面。

This means that only the front of the valve shaft is accessible.

youdao

这就意味着只有阀门轴的前端面可以作为检测面。

This means that only the front of the valve shaft is accessible.

youdao