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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.
control systems comprising computer hardware, operating software, and sensors for flow, battery voltage, panel voltage, amperage, temperature and pressure for use with positive displacement pumps used to dose or inject chemicals, including performance-enhancement chemicals (pecs), for use in hydrocarbon production, transportation, refining, and other industrial applications