4582| 4
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求結構的幾何截面的慣性矩,慣性積,極慣性矩,靜矩,主慣性軸,都跟實際有什么意思。 |
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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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