【摘要】 本文讨论机构的机械效率与其速比之间的关系，分别根据斜面及杠杆这两种基本的变速方式进行具体讨论，得出定量关系，并得出采用杠杆方式变速较斜面方式变速可以获得较大的机械效率的结论．更多还原

【Abstract】 An analysis of the relationship between machine efficiency and speed ratio, especially for two essential situations of the speed change of inclined plane and lever, is made and quantitative relationship is obtained.更多还原