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一個零件,"精度要求 3級精度, IT6~IT7公差等級"這句話矛盾嗎? |
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評分
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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(wǎng)安備33038202004372號 )
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