1. The essential technical matters of boat-tractor design in the respect of driving and loading condition;Tao,1990
2. Study on a new kind of walking wheel;Zhang,1990
3. Theoretical analysis of a wheel driven root crop harvester;Sakai,1990
4. Very advanced propulsion spheres for high speed tracked vehicles;Fijalkowski,1990
5. A new locomotive system: steering, propelling and supporting vehicle body by rolling bowls;Horio,1990