| Gb | Eng |
|---|---|
| 变速器，换档装置在一传送过程中从一个齿轮变到另一个齿轮的一种机械装置 | A mechanism for changing from one gear to another in a transmission. |
| 那两个齿轮一啮合, 机器就启动了. | The two cog-wheels engaged and the machine started. |
| 脱轨器，转撤器通过在不同大小的扣链齿轮间移动链条而转换自行车齿轮（换档）的装置 | A device for shifting gears on a bicycle by moving the chain between sprocket wheels of different sizes. |