| 摘要 |
<p>Reversible pressure pin (1) which is provided with a stem (2) presenting a longitudinal axis (A), and being also provided with an end head (3) which is integral with the stem (2); a spiral thread (4) which extends along the stem (2), and presenting an outer placement surface (5)which is inclined at an angle which is substantially equal to 24° in relation to the axis (A) and in a placement direction (G) of the pin (1) itself.</p> |
