| 摘要 |
Ducting system intended for inlet and/or exhaust air, which comprises an air duct 10, a maintenance hatch 28 arranged in the wall 12, 22 of the air duct and a regulating and shut-off damper system 30 arranged transversely through the air duct. The damper system comprises parallel control dampers 48, which have been arranged in a frame construction having essentially the same cross section as the duct. The damper system 30 is fixed to the maintenance hatch 28. <IMAGE>
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