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Publication of SE101220C1publicationCriticalpatent/SE101220C1/sv
F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERALĀ ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
F23L11/00—Arrangements of valves or dampers after the fire
F23L11/02—Arrangements of valves or dampers after the fire for reducing draught by admission of air to flues