短語詞組短語spiral -weld steel pipe pile 螺旋電焊鋼管樁spiral weld seam 螺旋焊縫spiral weld pipe mill 螺旋焊管機SAW spiral weld pipe 螺旋埋弧焊管conical spiral weld pipe 錐形螺旋焊管spiral weld -pipe mill 螺旋焊管機Spiral weld pipe production line 螺旋焊管生產線 返回 spiral weld