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自行车无损加装电动助力器、动力强劲整机防水全铝合金轻便耐用
450瓦无刷电机、链条传动动力强劲 霍尔五档定速巡航、解放双手 单向锁止轴承牙盘无磁阻无噪音 全金属结构、刹车断电、骑行更安全 最高速度40公里/小时，续航30-70公里
自行车电动助力器28/28
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