| 摘要 |
The tool has a plate (1) with a bent profile that is rounded around a hexagonal centric core (2). The hexagonal centric core protruding from a top side of the plate comprises a concentric central channel opening. The rounded bent profile extends around two cylindrically shaped spikes (4), which are arranged on a lower surface of the plate. The arrangement of the profile extending around the spikes is symmetrical. |
