You must have used the hydraulic bent sub (knuckle) which are made in our company.

你们一定用过我们公司临盆的液压弯接头吧。

youdao

You must have used the hydraulic bent sub (knuckle) which are made in our company.

你们一定用过我们公司临盆的液压弯接头吧。

youdao