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.
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.
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。
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