And one of important quality index that wearability is change bottom, the wearability that increases bottom change has very great society sense.

• 众所周知,底革是制造高档鞋的重要材料之一,它有很好的卫生性能。而耐磨性是革底的重要质量指标之一,提高底革的耐磨性有很大的社会意义。