| 摘要 |
<p>An automatic control system for a vehicle (21) comprises a pair of guide members (24, 25) each located on and being moveable along a respective one of two opposing sides of an area to be traversed by the vehicles, motive means (22, 23) for driving the vehicle back and forth between the guide members and drive means for moving the guide members (24, 25) each along their respective side of the said area in fixed increments each time the vehicle completes a pass over the said area.</p> |
