| 摘要 |
<p>A cemented carbide tip (3) is provided with a socket (21) for mounting onto the steel shank (5) of a cutter bit. The socket (21) has an annular convex surface (23) therein extending from the earth engaging portion of the tip (3) radially inwardly and forwardly. This convex surface (23) is brazed to the forward end (9) of steel shank (5) to form a cutter bit.</p> |
