| 摘要 |
The invention relates to a sash for laboratory fume hoods, having two telescopically movable slides, a front slide (4, 4') and a rear slide (8, 8'), of which one slide (4, 4') is connected to a counterweight via a pulling means (6, 6'). The front slide (4, 4') is suspended at one end (5) of the pulling means (6, 6'), of which the end which is directed away from the end (5) fixed to the slide is fastened on the counterweight. The rear slide (8, 8') is supported by elements (10, 9) which are in operative connection with the front slide (4, 4') such that the rear slide (8, 8'), when the front slide (4, 4') moves, moves in the same direction as the front slide (4, 4') and over half the distance of the front slide (4, 4'). |
