【教學系列】如何變速? / 如何計算齒比? / 變速教學 / 變速按法
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Channel: 小宇單車
Views: 132,617
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Keywords: 變速教學, 齒比計算, 認識變速
Id: nRxjiIviGkY
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Length: 5min 13sec (313 seconds)
Published: Fri Apr 02 2021
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