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何在勻速運(yùn)動(dòng)的薄膜上固定間距打孔?薄膜是一直運(yùn)動(dòng)的。 |
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本版積分規(guī)則
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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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