5783| 25
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一個(gè)挺有意思的東西 |
評(píng)分
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點(diǎn)評(píng)
這位大俠說(shuō)的好
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點(diǎn)評(píng)
有的輪子會(huì)反轉(zhuǎn),都靠齒輪的話機(jī)構(gòu)會(huì)很復(fù)雜,。功耗也大
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