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加装电动助力器自行车秒变电动车60公里超长续航速度45公里/小时
加装电动助力器自行车秒变电动车60公里超长续航速度45公里/小时 全铝合金机身IP67级防水 安装简单不破坏原车 双电机设计、自动离合无磁阻
自行车电动助力器27/28
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