| 摘要 |
<p>-10 A rotary drill bit includes an elongate drill bit body having a slot at a forward end, an edge protector received in the slot of the drill bit body and a cutting insert having a cutting edge. The edge protector includes: a first side having a first bottom edge and a first top edge; a second side opposed to the first side, the second side having a second bottom edge and a second top edge; and a bottom portion adjoining the first bottom edge of the first side and the second bottom edge of the second side. The cutting insert is received in the edge protector such that the cutting edge is recessed below one of the first top edge of the first side or the second top edge of the second side. A -22 ---- 12</p> |
