5448| 16
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請問梁的許用撓度和許用轉角在哪里可以查到? |
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點評
請問材料版本是什么版本?
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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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