This paper introduces the design of valves of four-stroke motorcycle engines and relating problems on material selection and their influences on engine performances.
本文介绍了四冲程摩托车发动机气门设计和选用材料的有关问题，及对发动机性能的影响。
This paper introduces the design of valves of four-stroke motorcycle engines and relating problems on material selection and their influences on engine performances.
本文介绍了四冲程摩托车发动机气门设计和选用材料的有关问题，及对发动机性能的影响。
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