| 摘要 |
The borer has a front end with slots in a boring direction for the admission of a multi-cutting plate. The multi-cutting plate has four cuttings, where the cuttings are arranged in crossing disk bodies (20, 22). The disk bodies have different disk heights (T1, T2) and depths. Two neighboring cuttings form an angle (b1) from 10 to 90 degrees. The four cuttings are provided on four different levels. |
