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复杂机械动图,直观机械原理 |
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点评
我觉得最难的是怎样制造到所需要的精度。
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Archiver|手机版|小黑屋|机械社区 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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