| 摘要 |
The oscillation centers or pivots (1, 2) of the links (3, 4) which support the blade-holder pendular frame (5) of the machine are automatically displaced by the rotational effect of the discs or eccentrics (6, 7) said rotation occuring automatically and continuously during the lowering phase of said frame (5) in order to achieve a perfect symmetry of the pendular motion with respect to the vertical axis whatever the position of the foot (8) of the actuation rod (9) may be. |
