- Impact compactor, for whose active wheel's structure is special, it requires highly for the traction force when working, and it is difficult to suit for the machine in working on today.
- This paper presents a fuzzy sliding-mode-based driving control of lunar rover with six active wheels running in the real world on the condition that small wheel slips and mismatch angle are taken into account.
- The office has been humming with activity.
- The threat of war has depressed business activity.
- There has been a lot of activity in the town today.
- The product is small an light.With four active wheels it is be moved conveniently. It can be used either in the store houses or in the workshop.