9828| 20
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請老師給這個齒輪設計減輕重量的孔 |
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點評
那得按照2樓說的來!模鍛和批量,得省料!
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點評
每欲苛責處,思我初學時。
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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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