| 摘要 |
<p>Improved Key Ring: consists of a casing (1) that contains a number of keys (2) that are made available by the action of pressing one of a number of buttons (3), each button (3) is associated with a particular key (2); the mechanism, that allows the release or extraction of each key (2), by means of the pressing an assigned button (3), comprises of an automatic system of folding the key (3), or piston arm (4), and a mechanical system of fixing and releasing the key (3) or track (16).</p> |
