| 摘要 |
A drive device comprises a first switchgear ( 9 ) and a second switchgear ( 11 ) which can be actuated respectively hydraulic pressure in an opening direction and via spring force in a closing direction, and which are provided with a device ( 26 ) by which the first switchgear ( 9 ) and the second switchgear ( 11 ) are to be actuated in the opening direction when the switchgears are actuated in the closing direction. |
