A small switching gear, a contrate gear shaft respectively fixedly connected with a big chain wheel and a big gear, a speed change gear set and a generator set are arranged in the casing.
外壳内，设有小切换齿轮、分别与大链轮和大齿轮固连的端面齿轮轴、变速齿轮组和发电机组。
To change the gear ratio, most automatic transmissions use planetary gear set.
为了能够改变变速器的传动比，大多数自动变速器使用了行星齿轮机构。
To change the gear ratio, most automatic transmissions use planetary gear set.
为了能够改变变速器的传动比，大多数自动变速器使用了行星齿轮机构。
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