13455| 10
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梁的剪切力方向如何判斷 |
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點評
為啥要“假設剪力F與圖示RA方向相同”,假設相反行不行?
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Archiver|手機版|小黑屋|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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