| 摘要 |
The upper part of the core cutting tool (2) is designed as a socket area (8) with a cylindrical space provided with a serrated inner surface (5) and an adjacent conical space (10), both matching the shape of the outer surface of the tool holding area (1), which is designed as a plug element with a plain cylindrical lower end (4), a serrated segment (5) and a conical segment (6). Both parts (1, 2) are secured with flanges (3, 9) provided with left hand threads (17, 18). |
