The back tyre tread is worn a little.
后车胎胎面有点磨损。
The back tyre tread is worn a little.
后车胎胎面有点磨损。
The application of alkyl dithiophosphate accelerator in NR based tread compound was investigated.
研究烷基二硫代磷酸盐促进剂在NR胎面胶中的应用。
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问题，欢迎向我们指正。
