28511| 29
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圓管上切去45º斜面,展開圖怎么畫? |
點評
是不是應該先等分圓后,在斜線上投影啊
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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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