10089| 21
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彎管(六分管,180度),1年8萬個,誰能做? |
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點評
摟主的敘述夠清楚,畫圖應無難度。21樓有按敘述所作圖。
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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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