| 摘要 |
<p>Recesses in a key are formed by a cutter having a shape corresponding to the shape of the tumbler pin to be associated with the recess. The recesses to receive perpendicularly extending pins are formed with parallel opposed side walls perpendicular to the key surface to decrease the total space required for recesses of greatest step value. Recess for 45 DEG inclined permutations are formed with one flat wall. Methods and apparatus are disclosed.</p> |
