Metal sheet ventilation/smoke duct section and manufacturing method thereof

作者： Lars Elmekilde Hansen , Kurt Munk Pedersen , Kenn Christensen

DOI:

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摘要: The invention relates to a metal sheet (15) ventilation/smoke exhaust duct section (10) for incorporation into duct, said sheets being covered on the outside by heat insulating material (20) and including elongated stiffening bar members (30) located of attached (15), characterised in at distance from discrete locations along length (30).

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