三价铬电镀方法的研究（上） 关键词：三价铬； 电镀； 硬铬； X-射线 [gap=648]Keywords：trivalent chromium； plating；hard chromium； X-ray
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... hard cash 硬币 hard chromium 硬铬镀层 hard currency area 硬通货地区 ...
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hard chromium plating 硬铬
hard chromium plated tool 硬质镀铬工具
hard chromium coating 硬铬
hard chromium coatings 硬铬
hard chromium layer 硬铬镀层
plating hard chromium 镀硬铬
electroplating hard chromium 电镀硬铬
hard chromium electroplating 镀硬铬
hard chromium plated layer 硬铬镀层
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However, in some small engines, the cylinder walls are plated with chromium, a very hard metal, to reduce wall wear and lengthen their life.
而对于一些小型发动机，气缸壁面镀铬，铬是一种硬度非常高的金属，可减少气缸壁的磨损并延长使用寿命。
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