而新一代草酸二甲酯加氢催化剂采用了无铬配方，性能指标也优于一代技术。
In addition a chromium-free formula is applied to prepare new generation dimethyl oxalate hydrogenation catalyst, showing better performance than the former generation catalyst.
黑铬是镀铬体系中的一种特殊镀种。本文简要介绍镀黑铬的镀液配方、工艺条件、影响因素及注意事项。
Black chrome is one of special strain in the system of chrome-plating. This paper simply introduced formula of plating solution, technical terms, influential factors and matters needing attention.
文章中给出了若干清洗、浸镀锌以及后来镀铜、镍、铬加工液的配方。
Several solution composition for cleaning, zinc dipping and subsequent copper, nickel, chromium plating are given.
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