| 摘要 |
The invention relates to a master key used in particular by postal staff for the opening, by them, of the letter boxes of private individuals, characterised in that the key (6) is a cylinder (cylindrical) key that includes bittings (notches) (5) distributed over the periphery of the active part of the key, the latter also including one or more identification notches (7) also distributed over the periphery of the active part of the key. Application: production of non-reproducible and identifiable master keys. <IMAGE>
|
