自行车的后轮刹车原理是什么?后轮的车轴上有个圆形的盒子套在车轴上,里面是什么构造啊?刹车用的什么原理?可不是那种胶皮的刹车片啊.碟还是鼓?

来源:学生作业帮助网 编辑:作业帮 时间:2024/10/01 12:56:29
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