... crack detector 探伤仪，裂纹探测仪 crack due to internal stress 内应力裂纹 cracked 裂解的，裂化的；有裂纹的 ...
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Bearing parts in the process of hardening cooling by internal stress due to the formation of quenching cracks crack said.
轴承零件在淬火冷却过程中因内应力所形成的裂纹称淬火裂纹。
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