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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.
particle monitoring instrumentation; specifically, particulate mass concentration monitors, particle size and number concentration monitors, air borne particulate samplers, isokenetic sampling systems (comprising heated glass sample collectors, pumps, connecting tubing, and control systems), sensitive paper systems (comprising chemically treated paper collectors, motors, revolution counters, and mounting stands), and integrated parameter analyzers