| 摘要 |
The invention relates to a roller having at least one roller axle and a roller body which can rotate relative to the axle by means of at least two bearings, wherein at least one of the bearings is supported on a bushing which can move relative to the roller axle in such a way that the orientation of the rotational axis, of the bearing supported on the bushing, in relation to the roller axle can be changed. |
