短語詞組短語butt -fusion welded joint 熱熔對接接頭butt fusion angle welder 角度焊機butt fusion welding machine 熱熔對接焊機butt fusion welding 對頭熔接;對接熔焊;熱熔對接焊Plastic pipe butt fusion machine 發(fā)明名稱polyethylene fitting from butt fusion 聚乙烯焊制管件 返回 butt fusion