The invention relates to field of shoes preparation, especially relating to preparation of composition of dewatering material for sole and heel and the usage.

本发明涉及鞋的制造领域，特别涉及鞋底、鞋跟疏水材料组合物的制 备与用途。

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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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