| 摘要 |
A lock of the type having a double bit key wherein the shape of the keyhole, and that of the corresponding key comprise a central circular core (2), a first bit (3) extending tangentially to the core, and a second bit (4) also extending tangentially to the core and which is directed generally away from the first bit (3), the two bits (3, 4) subtending an angle of other than 180 DEG with one another. <IMAGE> |
