Blade, has stilt attaching bulb part with platform and formed as plate that is limited by main surfaces, which include asymmetrical depressions located in direction perpendicular to plate, where depressions have different depths

摘要

The blade has a base (2) including a platform (4) that is connected with the blade, and a bulb part (5) arranged opposite to the platform. A stilt (6) attaches the bulb part with the platform. The stilt is formed as a plate limited by two main surfaces (7, 8), which comprise respective asymmetrical depressions (9, 10) located in a direction perpendicular to the plate, where the depressions have different depths. The depressions include flat bottom parts (11, 12) and curved edges (13, 14), which have uniform width corresponding to the depressions depths.