The welding of heavy thickness pipe for pump station pipeline is a very complicated and technical item.

大壁厚站场管道的焊接是一项技术性很强的工作。

youdao

The welding of heavy thickness pipe for pump station pipeline is a very complicated and technical item.

大壁厚站场管道的焊接是一项技术性很强的工作。

youdao