| 摘要 |
The key service or the hardware shop is equipped with a number of blanks (6), some of them with similar bits, which are finished at the request of the customer by copying the original key. The profile, groove, or recess (2.1, 2.2, 2.3, 2.4, 2.5) required for the particular item is created by a repeated processing with a router bit (3, 7.1, 7.2) of the appropriate shape, like a bit with rectangular teeth (3), or a bit with trapezoidal teeth. The design of the profile can be identified by using optical, acoustic, or mechanical methods. |
