| 摘要 |
The wheel e.g. for a hand-propelled paint stripping apparatus, is provided with a groove (39) in its outer surface in which an O-ring (41) is positioned. The narrow O-ring spaces the outer surface (19a, 19b) of the wheel away from the surface over which the wheel rolls and increases the frictional engagement of the wheel with the surface. The apparatus equipped with such wheels is thus able to maintain a straight course even when encountering gravel, pebbles and the like. <IMAGE> |
