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FRONTPAGE

week in history

作者:21ST
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Nov 20, 1866: The rotary-crank (回行曲柄) bicycle was patented by Frenchman Pierre Lallement. It was the first really popular design. But it earned the name of “bone-shaker” because of its rigid (不灵活的) frame and wheels that resulted in a “bone-shaking experience for riders”.
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