| 摘要 |
Drilling gauge for measuring the diameter of a drill. The drilling gauge 1 comprises a cavity narrowing in one direction, formed by a shell 2 or a portion of a shell 6, which shell 2, 6 is provided with a slot 3, 8 travelling in said direction, and there are markings 4 on the outside of the shell 2, 6 at said slot to indicate the minimum width of the cavity at the marking 4. <IMAGE> |
