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Search results with tag "Handbook of visual notification appliances for fire alarm"
Handbook of Visual Notification Appliances for Fire Alarm ...
www.edwards-signals.comVisual notification appliances are fire alarm devices that provide visual notifi- ... recognizable by people who have little or no knowledge of fire alarm systems, ... fect the ability of even those with no impairments to hear emergency signals. Factories, warehouses, even nightclubs and theatres frequently have sound ...