一个总铬涂层提高了耐腐蚀性能的普遍使用，通过硬化滚动轴承钢。
An overall chromium coating improves the corrosion resistance of the generally used through-hardening rolling bearing steel.
一个总铬涂层提高了耐腐蚀性能的普遍使用，通过硬化滚动轴承钢。
An overall chromium coating improves the corrosion resistance of the generally used through-hardening rolling bearing steel.
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