| 摘要 |
<p>The key blank has a manually operable rod (51) oriented along a longitudinal axis (X), and a key-bit (52) carried by an end (510) of the rod to activate a lock. The key-bit has a reduced section (50), in a plane (Pt) transversal to the longitudinal axis, partially made by a hollow groove (53). The reduced section is asymmetric with respect to all planes parallel to the axis (X) and makes the axis (X) as axis of symmetry of rotation.</p> |
