单面: single face; one side对焊: butt welding凹面对焊: concave butt weld双面对焊: double butt weld双面对焊接: double fillet welded lap joint; double welded butt joint; double welded lap joint单面v形对焊接: single v butt joint单面斜对焊接: single bevel butt joint; single-bevel butt joint凸面对焊法兰: raised face welding neck flange凸面对焊法烂: raised face welding neck flange带垫板单面对接焊: single-welded butt joint with back凹凸面对焊钢制管法兰: steel pipe welding neck flanges with male and female face for pn 0mpa; steel pipe welding neck flanges with male and female face for pn 5mpa; steel pipe welding neck flanges with male and female face for pn mpa环槽式密封面对焊法兰: ring joint welding neck flange环连接面对焊钢制管法兰: steel pipe welding neck flanges with ring-joint face for pn 0mpa平面、突面对焊钢制管法兰: steel pipe welding neck flanges with flat face or raised face平面对焊钢制管法兰: steel pipe welding neck flanges with flat face for pn 25mpa; steel pipe welding neck flanges with flat face for pn 6mpa; steel pipe welding neck flanges with flat face for pn0mpa; steel pipe welding neck flanges with flat face for pn6mpa梯形槽式密封面对焊法兰: ring joint welding neck flange凸面对焊钢制管法兰: steel pipe welding neck flanges with raised face for pn 0mpa; steel pipe welding neck flanges with raised face for pn 25mpa; steel pipe welding neck flanges with raised face for pn 5mpa; steel pipe welding neck flanges with raised face for pn 6mpa (bar)gb/t 8-pn 0mpa(bar)突面对焊钢制管法兰: steel pipe welding neck flanges with flat face or raised face榫槽面对焊钢制管法兰: steel pipe welding neck flanges with tongue and groove face for pn 0mpa; steel pipe welding neck flanges with tongue and groove face for pn 5mpa; steel pipe welding neck flanges with tongue and groove face for pn 6mpa对焊: [冶金学] butt welding◇对焊钢管 butt-welded tube; 对焊机 butt welding machine; 对焊接头 [电学] butt joint凹凸面对焊环板式松套钢制管法兰: loose plate steel pipe flanges with welding neck collar with male and female face环连接面对焊环带颈松套钢制管法兰: loose hubbed steel pipe flanges with welding neck collar with ring-joint face凸面对焊环松套板式钢制管法兰: loose plate steel pipe flanges with welding neck collar with raised face for pn 0mpa突面对焊环板式松套钢制管法兰: loose plate steel pipe flanges with welding neck collar with raised face突面对焊环带颈松套钢制管法兰: loose hubbed steel pipe flanges with welding neck collar with raised face