| 摘要 |
<p>A detachable cutter head (6), for fitting to a portable electric drill, comprises a movable blade (10) mounted to pivot with respect to a fixed blade (9) which consists of a leg portion (30) and a forwardly and laterally extending foot portion (31) defining a first shearing face (36). The movable blade (10) comprises a bifurcated leg portion (17) extending along side the fixed blade portion (30), and a foot portion curled towards and below the first shearing face (36) to form a second shearing face (50) with a rear bevelled edge (51), cooperating with the first shearing face (36).</p> |
