| 摘要 |
The opposing edges of the central opening of the lever (1) and of the control eccentric (3) are hollowed out with grooves (1a, 3a) which define a track for the rolling of balls (7). These are inserted between the partitions (8a) of a cage (8) through the passage obtained by bringing two notches (1b, 3b) provided for this purpose into coincidence. <IMAGE> |
