subsurface crack

皮下裂纹,subsur... ... ) underbead crack 焊道下裂纹 ) subsurface crack 皮下裂纹 ) subsurface transversal crack 皮下横裂纹 ...

亚表... ... ) sub-surface 亚表面层 ) Subsurface crack 亚表面裂纹 ) Surface / subsurface crack damage 表面/亚表面裂纹损伤 ...