6774| 13
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這個(gè)單氣缸活塞是怎么使機(jī)身實(shí)現(xiàn)正反旋轉(zhuǎn)的? |
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評(píng)分
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點(diǎn)評(píng)
說(shuō)錯(cuò)了,不好意思,既然是鏈條鏈輪,自然是樓上結(jié)構(gòu)。
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