折叠裂纹 meaning in Chinese

fold crevice

The fatigue fracture occurred in the root of the screw where defects such as decarburization and cracks existed , and these defects made the zone to be a stress concentration area and caused the bolts to break finally
疲劳裂纹的形成是由于螺纹牙底存在脱碳和折叠裂纹等缺陷，这些缺陷的存在使该材料产生了较大的应力集中，从而导致螺栓开裂失效。
Not a timely manner to facilitate the dissolution of auto parts fault detection , vulnerability directly on the surface of metal parts nondestructive testing of the fatigue crack , stress corrosion , crack , crack , etc . folded through " sound " , " light " emergency instructions crack site to the maintenance staff promptly eliminate hidden dangers and guarantee the exercise of automotive safety
及时方便不解体检测汽车部件故障，直接对易损金属部件表面进行无损检测，对出现的疲劳裂纹，应力腐蚀、裂纹、折叠裂纹等、通过“声” 、 “光”报警指示裂纹的部位，以使维修人员及时排除隐患，保证汽车安全行使。