After 5 iterations sole weight of body frame is decreased by 14%.
经过5次迭代，车身骨架自重减轻了14%。
Comparing with ordinary rubber sole, PU sole is light in weight with better abrasion resistance.
聚氨酯鞋底与普通橡胶鞋底相比，它具有质量轻、耐磨性能好等特点。
Comparing with ordinary rubber sole, PU sole is light in weight with better abrasion resistance.
聚氨酯鞋底与普通橡胶鞋底相比，它具有质量轻、耐磨性能好等特点。
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