结果表明，这种机械自动换向的方法是可行的。
The result shows that the automatical reversing method is feasible.
分析了直流电动机在使用过程中常见的影响直流电机换向的几个因素。
Several common factors having influence on Commutating of DC motor during operation of it.
齿轮传动主要是通过齿轮的啮合作用来传递动力及实现减速、增速或换向的目的。
Gear power transmission is mainly through gear meshing to transmit power, realizing reducing and increasing speed or changing direction.
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