| 摘要 |
<p>The head (2) of the tool (1) has cutting edges (3) sweeping out a circle of diameter slightly greater than that of the body (4) of the tool. The body contains a movable hook (10) which may engage a pin (7) on the end of the tool shank (6). The small diameter shank fits into a socket in the tool body which has cutouts (13) at its edge, which accommodate lugs projecting sideways from the shank to transmit torque from the tool body to the tool shaft.</p> |
