autogenous welding shield glass 气焊用护目镜玻璃

electric welding shield glass 电焊用护目镜玻璃

gas shield welding [机] 气体保护弧焊 ; 气保焊

shield arc welding 封闭电弧焊

welding grade shield gas 焊接级保护气体

gas shield arc welding 气体保护电弧焊

mixed gas shield welding 混合气体保护焊

welding face-shield 焊工面罩

shield welding 保护焊