新颖的杠杆—行星加速装置传动可有效地利用骑手的蹬力，骑手用较小的力可始终如一地获得较大的驱动力。
A novel lever-planet acceleration apparatus drives the bicycle so as to effectively utilize the pedal force of a rider and the rider can always obtain larger driving force with smaller force.
新颖的杠杆—行星加速装置传动可有效地利用骑手的蹬力，骑手用较小的力可始终如一地获得较大的驱动力。
A novel lever-planet acceleration apparatus drives the bicycle so as to effectively utilize the pedal force of a rider and the rider can always obtain larger driving force with smaller force.
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