| 摘要 |
<p>The joint has two metal loops (10, 11) which form an articulated joint about two axes (3, 4). The core (5) is made from moulded plastic and has two grooves perpendicular which are to each other the shape of the grooves matches the shape of the two loops. The two axes are displaced relative to each other by a fixed distance greater than the thickness of the loops. The provides a couple between the two axes and the centre of the plastic core.</p> |
