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制圖教材上說(shuō)對(duì)稱(chēng)結(jié)構(gòu)的尺寸不能只標(biāo)注一半,為什么? |
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Archiver|手機(jī)版|小黑屋|機(jī)械社區(qū) ( 京ICP備10217105號(hào)-1,京ICP證050210號(hào),浙公網(wǎng)安備33038202004372號(hào) )
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