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M30×2-6H和M30×1.5-6H的螺紋該選用那一個(gè)公差等級(jí)的環(huán)規(guī)檢驗(yàn) |
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小黑屋|手機(jī)版|Archiver|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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