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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.
audio electronic components, namely, sound masking equipment comprised of amplifiers, speakers, and masking sound generators, speech privacy equipment comprised of amplifiers, speakers and masking sound generators, and eavesdropping protection equipment comprised of electronic transceivers for blocking or inhibiting interrogation signals, acoustic baffles and damping materials, and white and pink noise generators