The outsole is where the boot meets the trail, available in different compositions of rubber with various tread patterns.
鞋跟是靴子接触道路的地方，可采用不同成分的橡胶和多种鞋底花纹。
2
The compositions of vulcanized rubber are qualitatively and quantitatively analyzed by chemical analysis method. This is of great importance as a practical guidance in developing new products.
用化学法对硫化橡胶成分进行定性、 定量分析，对新产品开发有实际指导作用。
3
Neoprene: the trade name for the synthetic rubber, polychloroprene, developed by Du Pont in 1931. It is widely used as an adhesive in shoemaking and in soling compositions.