4386| 10
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制圖 形位公差探討 |
點評
你家線切割有這么準嗎
肯定是插鍵槽
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點評
這是個內切圓
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點評
慢走絲做一個這個多少錢?
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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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