梯子脚底是否有很好的止滑垫片。如金属梯子脚底的橡胶，延伸梯的防滑垫片。
Ladder feet are in good condition, e. g. rubber tips on metal rolling ladders. "Safe-Hi" feet on extension ladders.
大底部采用耐磨、高密度进口合成橡胶，具有耐磨止滑性。
Sole is wear-resistant skidproof and high-density synthetic rubber.
网球运动特点要求网球鞋大底具备止滑性能，中底具备能量回归性能。
The tennis movement character request that the big bottom of tennis shoes has stop the slippery performance and the middle of bottom has the energy return performance.
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