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號稱全球最省力的自行車,,傳動效率高達(dá)99% |
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點評
這個不高,吊起來的才高
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小黑屋|手機(jī)版|Archiver|機(jī)械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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