Gmaw short - arc tack welds shall not be incorporated into the root pass 熔化极气体保护焊-短弧点焊焊缝不能与根部焊道合成一体。
2.
The gmaw short - arc process shall not be used for welding socket welds or the root pass of o - lets and branch connections 熔化极气体保护焊-短弧工艺不适用于承插焊接或出口和分支连接的根部焊道。