| 摘要 |
In a side view, the trunk (10) presents substantially a circular form and is provided with rolling elements configured like rings (36) or wheels (136) which are rotatingly mounted to the trunk in a plane perpendicular to the longitudinal axis of the trunk. The outer diameter of those rolling elements is larger than the largest outer diameter (28, 30) of the trunk, so that the latter may be moved on a floor by rolling on its rolling elements. |
