Adjustable and sound-damping air throttle for ventilation ducts comprising a through-body insert body which is optionally closable with plugs
SE0103366D0
Sound-absorbing cable feed arrangement can be applied in through passages in walls, ceilings, floors or similar, preferably combined with so-called electric channel or groove
SE0004467D0
Sound-insulating construction comprises sound-absorbent material placed or incorporated in air or gas intake, has width or depth between 50 and 200 mm and length or diameter dependent upon rate of flow
AU2956200A
Air diffusor
SE9703041D0
Draught increasing device for chimney or non mechanical extractor hood
