| 摘要 |
A vehicle (2) is provided with a number of retractable supporting wheels (5). When this vehicle (2) is coupled to a load (3), the supporting wheels (5) can be lifted off the ground so that a very easily controllable assembly (1) is produced. Through the correct selection of the position of the centre of gravity, the wheel pressure on the drive wheels (4) is as great as possible. Due to the fact that the supporting wheels (5) can be raised independently, coupling with a load is facilitated. |
