边沿牙子 街市滑障碍物上滑板接触最多的部位一般都是边缘处 用来跐板和碾磨
The part of the sliding board that comes into contact with the most on the edge of the street sliding obstacle is generally the edge, which is used for sliding and grinding
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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