Now to widespread adopt continuous MAW (merge arc welding) method produces spire steel tube.

目前普遍采用连续成型、埋弧焊接的方法制造螺旋钢管。

youdao

Now to widespread adopt continuous MAW (merge arc welding) method produces spire steel tube.

目前普遍采用连续成型、埋弧焊接的方法制造螺旋钢管。

youdao