对焊端 meaning in Chinese

butt welded end

Face - to - face dimensions for buttweld - end globe - style control valves
对焊端球型控制阀端间尺寸
Industrial valves - butt welding ends for steel valves ; german version en 12627 : 1999
工业阀门.钢阀门用对焊端头
Industrial valves - end - to - end and centre - to - end dimensions for butt welding end valves
工业阀门.对焊端部阀门的端与端和中心与端面的尺寸