Chromium layer is a kind of metal plating layer with high-hardness and high-wearability, and corrosivity-bearable, widely used in plating industry.是什么意思_Chromium layer is a kind of metal plating layer with high-hardness and high-wearability, and corrosivity-bearable, widely used in plating industry.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句