2990| 8
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偏三轮摩托车减速时车把会摆动 |
点评
从文字叙述里看不到几何图形,这问题就出在几何的不对称,提速与减速差异在于前轮拖曳距受力变异
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小黑屋|手机版|Archiver|机械社区 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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