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<p> Wildeboer, fire damper, EN1366, smoke damper, swirl diffuser, ceiling diffuser, air diffuser, air grille, volume flow rate controller, volume control unit, smoke detector, fire protection products, DIN 4102, air distribution products, noise protection, smoke removal, ventilation and air conditioning systems, fire protection, hvac products, air valve, fire protection valve, sound attenuator, Trox, Schako, ventilation unit, fire safety, ventilation engineering, shutt-off damper, spring return actuator, ventilation duct, limit switch, fire classification, fire dampers, smoke dampers, swirl diffusers, ceiling diffusers, air diffusers, air grilles, volume flow rate controllers, volume control units, air valves, fire protection valves </p>