| 摘要 |
<p>The physiotherapy aid comprises a flat circular disc (1) with three pairs of aligned holes lying along a diameter (6,7,10,11,12, 13). The disc can be fixed to hemispherical elements (2) with a pair of cylindrical tenons (15,16) extending from the plane surface. The underside of the disc has three small magnets (4,8,9) inserted into it and these have their North poles facing outwards. Between the tenons on the plane face of the semi-spherical element is a small magnet which has its South pole facing outwards. The two elements are fitted tougher by engaging the tenons in a selected pair of holes and engaging the two corresponding magnets.</p> |
