| 摘要 |
The triangular shaped blade (1) is equipped with a cutting edge (7) and a rectangular fixing area (3) with holes (5) for the insertion of rivets in order to be joined to a holding element (4). The edge of the blade (1) is surrounded by a hardened area (8), slightly wider than the cutting edge (7), which continues (9) to the fixing area (3), leaving a space around the rivet (5). The hardened area (8,9) forms a supporting frame for the blade (1) which is no longer in danger to break at the transition zone between blade (1) and fixing area (3). |
