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Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
interphones, pushbutton panels and electric door release devices, pushbuttons and pushbutton panels made of plexiglas, presence signalling units, devices for requesting entry to offices-namely, bells and buzzers, "ding-dong" chimes, electro-mechanical ringers having a percussion drum in the form of a bell, and waterproof bells, label-type indicating panels, lighted number indicating panels, signal lights with or without relays, spares, relays, lamps, transformers, illuminated name labels, lightning-rod tips, electrically operated locks, "flag" signal lights