2996| 7
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螺母與螺桿受力分析 |
點評
那對閣下自然是瞎扯,閣下玩的是宏觀視角,早就不關心這具體細節了
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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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