| 摘要 |
<p>The device (10) has protection slides (11, 12) supported in a vertically displaceable manner, and a sliding mechanism (15) moving the protection slides from an open position (SO) to a closed position of duct openings (6, 7). The duct openings are completely covered by the protection slides in the closed position. The mechanism comprises a lever arrangement (16) that is articulated on the protection slides and on a compensating element in such a manner that weight acting on the compensating element produces force acting on the protection slides in an opposite direction.</p> |
