7745| 17
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長孔標注,,求助 |
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點評
說的對
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點評
正解,,這種標法就是直徑和總長
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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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