| 摘要 |
A security key for lock barrels, featuring at least one longitudinally-orientated security groove (2) whose longitudinal dimension shall be considerably less than the length of the habitual insertion grooves (3), its profile and longitudinal dimension being such that they correspond to complementary means existing within the plug (5) of the barrel (4), which shall be at least one security insertion pin (7) and another complementary means which shall be the length limit measuring pin (8) of the security groove (2). |
