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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 connection to a telephone private automatic branch exchange (pabx) or key telephone switching apparatus for providing one or more functions of alternate or least cost trunk call routing, speed dialing, tone to pulse conversion, pulse to tone conversion, toll trunk access control, digital signal security, automatic redial, and toll call account registration; tone receivers, loop to ground start converters; tone ringers; tone generators; intercoms, and tone filters