| 摘要 |
<p>A rotating device (1) arranged to rotate about an axis and having a body portion (2) containing a cavity (20), the body portion (2) having an upper surface (10) having a substantially circular access hole (12) therethrough generally of a first radius from the axis and providing access to the cavity (20), and at least one drive surface arranged to have force applied thereto to rotate the device (1) and being provided in the cavity (20) at least a second radius from the axis wherein the second radius is greater than the first.</p> |
