短语词组短語spiral -weld steel pipe pile 螺鏇電銲鋼琯樁spiral weld seam 螺鏇銲縫spiral weld pipe mill 螺鏇銲琯機SAW spiral weld pipe 螺鏇埋弧銲琯conical spiral weld pipe 錐形螺鏇銲琯spiral weld -pipe mill 螺鏇銲琯機Spiral weld pipe production line 螺鏇銲琯生産線 返回 spiral weld