| 摘要 |
The profile cylinder key (10) has a key head (12) and a key shaft (14) that is originated from the key head. The key shaft. The key shaft has a cross-section provided with two thickness regions and a waist regions that is widened between the both thickness regions. The cross-section of the both thickness regions is formed in polygonal shape. The sides or longitudinal edges (24,26) of the polygonal cross-section form a detection protrusion. The detection protrusion is deformed plastically. |
