air hardening 气冷硬化。 case hardening 表面硬化。 hardening by cooling 冷却硬化。 hardening by hammering 锤击硬化。 hardening process 硬化法。 the hardening of arteries 动脉硬化。 hardening through 【机械工程】淬透。
the act of making something harder (firmer or tighter or more compact)
the process of becoming hard or solid by cooling or drying or crystallization; "the hardening of concrete"; "he tested the set of the glue" 同义词:solidifying, solidification, set, curing,