| 摘要 |
A cutting insert (120, 140, 210, 610, 510) is disclosed in which at least one corner portion of the insert has a penetrating segment (100, 400, 200, 500, 600) of a given radius for penetrating a workpiece and an adjacent finishing segment (105, 405, 205, 505, 605) having a greater radius or greater radii which follows the penetrating segment to improve the surface roughness of the workpiece.
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