A combination of over three years of work experience in the trade and some high school or college courses in motorcycle repair is usually required to be eligible for trade certification.
或者通常需要超过三年的行业内工作经验，和的高中或摩托车修理大学课程的组合，才有资格获得行业认证。
A coating combination of nickel strike, semi-bright and bright nickel, nickel sealing plus decorative chromium is suggested to provide motorcycle parts with the standard quality finish.
对摩托车零件电镀采用预镀镍-半光亮镍-光亮镍-镍封-装饰铬的组合镀层工艺，能完全符合质量标准要求。
Design of combination additive for bright nickel plating is described here and the application result of BH-931 bright nickel plating process on motorcycle parts is reported.
本文论述电镀光亮镍组合添加剂的设计以及BH - 931电镀光亮镍工艺在摩托车零件上应用的结果。
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