2971| 8
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關(guān)于軸承座的問題 |
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點(diǎn)評
這玩意當(dāng)年要用,都是對著手冊一筆一筆畫出來的剖面圖,現(xiàn)在好了,3D模型自動(dòng)生成。
數(shù)學(xué)鬼才,哈哈
沒毛病
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