The motor drives a gear at the top of the tail, causing the tail to swing back and forth, which propels the robot upward.
发动机带动机器人尾巴顶部的齿轮，引导尾巴前后摇摆，推动其上升。
2
Watch magnetic, magnetic wheel makes the swing frequency change, so the speed of the gear system will change, watch.
手表受磁后，磁力使得摆轮的摆动频率改变，于是齿轮系统的运转速度也就改变，手表走时发狂。
3
In which the rolling moment system adopts gear-rack swing hydraulic-pressure oil VAT with torque sensor, the moment of inertia, damp and comeback can be adjusted.