4267| 7
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求助,三個(gè)滾軸中間設(shè)置一個(gè)圓管,使圓管旋轉(zhuǎn)捻出,這是什么結(jié)構(gòu)? |
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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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