In the longitudinal direction going either direction you use the L1+R1 wheel sets on both ends as steering axles and the L2+R2 stay stationary.
英
美
- 在纵向方向去任何方向 使用L1杠杆+方向盘套R1两端为指导车轴和L2杠杆+ R2的方向盘平稳。