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基線(0-line)這個(gè)是何物?為什么可以0-line可以標(biāo)公差呢? |
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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