| 摘要 |
<p>The invention relates to a drill bit (10). The drill bit (10) comprises a body (16), being of generally truncated cone shape, and the periphery of which has three blades (18) arranged thereon. The invention also relates to a corresponding plug (30) and a method of shaping a hole in a partition of a building, so as to produce a bore of generally truncated cone shape.</p> |
