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復雜機械動圖,直觀機械原理 |
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點評
我覺得最難的是怎樣制造到所需要的精度。
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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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