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軸向可伸縮的機(jī)構(gòu),全新設(shè)計(jì) |
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點(diǎn)評(píng)
這里也有一種國(guó)產(chǎn)的鏈條做走向支撐的例子:http://www.ytsybjq.com/thread-478028-1-1.html
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