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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 equipment, namely, power audio amplifiers, receivers, tuners, graphic/parametric equalizers, audio compressors, audio mixing consoles, speakers, speaker enclosures and cabinets and speaker grills/baffles-- electrical equipment, namely, electrical impedance matching systems comprising volume controls and speakers selectors for residential or commercial sound/public address systems, audio cables, electrical connectors, electrical control systems comprising sound room combining or sound source distribution modules for residential or commercial public address sound systems, volume controls, attenuators and electrical transformers and wall outlet connector plates