| 摘要 |
<p>The body (1) has a portion (2) used for the hooking thereof and a first longitudinal recess (3) as well as a second transversal recess (4) crossing and intersecting the first recess. A lock (5) is provided to engage the recess (4) and act on the end of the string (11) previously fully engaged in (3) to act on it and extend it so that it takes a curved shape preventing any accidental unfastening of the string. </p> |
