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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.
apparatus for recording, transmission and reproduction of sound, namely, loudspeakers, amplifiers, sound controllers for volume and channel selection, baffles, microphones, and accessories for such devices, namely, power sources, consoles for microphones, plastic covers and adjustable rings for loudspeakers and controllers and cover plates and cables; all the above for audio control and distribution