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。
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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