5151| 7
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圖中SR15和R15節點應該怎樣計算? |
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點評
SR15的球與直徑38的圓柱怎么相切的。
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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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