Potentiometer; Microbiosensors used in industry; Measuring, regulating and control apparatus; 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; Mechanisms for coin-operated apparatus; Cash registers, calculating machines, data processing equipment and computers; Fire-extinguishing apparatus.;
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