3883| 11
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鋼板攻絲與螺桿連,,板厚取值問題 |
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點評
這個還真沒去查過
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,,浙公網安備33038202004372號 )
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