4414| 5
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請問為什么車輪所受支撐力跟所受重力會偏離一個滾動摩擦因數(shù)的距離 |
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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