underbead crack [机] 焊道下裂纹 ; 焊珠底龟裂 ; 焊道底裂纹 ; 焊道下裂缝

underbead cracking 焊道层底纹裂

Battelle type underbead cracking test 巴特尔焊道下裂纹试验

underbead cracks 焊道下裂纹

underbead cracking test 焊缝下裂纹试验

underbead crack test 焊道下裂纹试验

underbead covering 内部裂纹

underbead crack susceptibility 焊道下裂纹敏感性