短语词组短语spiral taper pipe 锥形螺盘管Quality Spiral steel pipe 标题spiral welded pipe mill 螺旋焊管机组SAW spiral weld pipe 螺旋埋弧焊管spiral welded pipe unit 螺旋焊管机组tapered spiral seed pipe 锥形螺旋导种管long spiral drilling pipe 长螺旋钻管 返回 spiral pipe