“surface hardening”的概念、定义、翻译、参考文献-科学参考

单词	surface hardening
释义	surface hardening [`sǝr·fǝs ´härd·ǝn·iŋ] ^METALLURGY Hardening the surface of steel by one of several processes, such as carburizing, carbonitriding, nitriding, flame or induction hardening, and surface working.
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