变速器毕业中期外国文献翻译

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Auto transmission
Car Transmission， it is a used to co-ordinate the engine speed which practical driving speed and wheel speed change device， used for engine play the best performance。Transmission can be in the process of the car， in different ratios between the engine and wheels， by shift can make the engine work under the best dynamic performance of the state。The development trend of transmission is more and more complex， more and more is also high degree of automation， automatic transmission will be the mainstream of the future.