| 摘要 |
<p>The tool (1) is joined to a spindle with its upper conical end (3) positioned on top of collar (8, 40). A short cylindrical segment (2a) is located adjacent to the collar (40) followed by a segment (2b) forming two obtuse angles at the back and a single obtuse angle at the front. The cutting blade (7) is joined to the upper surface of the lower segment (2b). The tool (1) is guided through the bore (11) in the work-piece (10) along a particularly shaped curved path, facilitating the creation of differently shaped border areas (12, 13, 16) at the bore (11).</p> |
