传动油又称自动变速器油(ATF)或自动传动油，用于由液力变矩器、液力偶合器和机械变速器构成的车辆自动变速器中作为工作介质，借助液体的动能起传递能量的作用。
对汽车液力传动系统的优越性、液力自动传动油的作用、性能进行了简要叙述，并介绍了国内、外液力自动传动油的分类和使用。
The advantages of a hydraulic transmission system, the effect and property of hydraulic transmission fluid are given. Its classification and usage at home and abroad are introduced.
对内燃机车液力传动油的特性及要求等作了介绍，同时叙述了液力传动油的国内外概况，介绍了新型液力传动油的研究和应用情况。
The general conditions of the research process of the metal setting problem of the high friction composition brake shoes at home and abroad are introduced.
这样使发动机和传动系输入油可靠地接合，使它们以相同的转速运转。
This locks the engine to the transmission input shaft, causing them to spin at the same speed.
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