nigrescence
常見例句
- This paper work out a better applied technique of steel normal-temperature quick nigrescence via discussing various factors' influence on the speed of nigrescence and the capability of plating.
本文討論了諸多因素對黑化速度及黑化膜性能的影響，確定較好的常溫快速化學發(fā)黑實用技術。 返回 nigrescence