| 摘要 |
<p>The reamer, for fine smoothing of drillings in metal workpieces, has at least one main cutting zone (39) and at least one secondary cutting zone (41). The cutting face (43) is next to the cutters, with an adjacent cutting guide step (45) which drops at the secondary cutter to give an increasing gap between them. The cutting step ascends at the main cutter, to give a decreasing gap between them.</p> |
