3650| 10
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受力分析 |
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點評
重力作用在支撐點上,建議你把所有的連接點都畫出來在做受力分析
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小黑屋|手機版|Archiver|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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