metal arc welding

... 金属极惰性气体保护点焊metal inert gas arc welding 金属极电弧焊接metal arc welding 电焊eletric welding ...

 metal inert gas arc welding

... cross weld 金属极惰性气体保卫点焊 metal inert gas arc welding 金属极电弧焊接 metal arc welding 电焊 ...