| 摘要 |
<p>Return rolling ball belongs to constructions or objects in the field of entertainment, recreation and group or single participation sports. Return rolling ball consists of an outside synthetic cover appropriately shaped (2), with a specific construction of the rotor (10), with a static gravity center stable stator (11), spherical sector condenser (3) kinematically connected in a way that they form and enable a whole as a form and needed function.</p> |
