短语词组短語butt -fusion welded joint 熱熔對接接頭butt fusion angle welder 角度銲機butt fusion welding machine 熱熔對接銲機butt fusion welding 對頭熔接;對接熔銲;熱熔對接銲Plastic pipe butt fusion machine 發明名稱polyethylene fitting from butt fusion 聚乙烯銲制琯件 返回 butt fusion