5418| 19
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一種機械機構設計方案請教 |
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點評
還是不明白,是不是只要把兩頭硫化后接成一體,其他地方不要硫化?
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Archiver|手機版|小黑屋|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
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