短語詞組短語longitudinally -welded pipe 直縫焊接管longitudinally welded steel pipe 直縫焊管longitudinally welded tube 直縫焊管X80 longitudinally welded pipe X80 直縫鋼管longitudinally welded pipe mill 直縫焊管機(jī)組Longitudinally welded pipes 直縫焊管Longitudinally Submerged Arc Welded Pipe 弧焊管longitudinally high frequency welded pipe 高頻直縫焊鋼管 返回 longitudinally welded