9 Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking, supervision, life-saving and teaching apparatus and instruments, namely, cameras, ground reaction force plates, force sensors, pressure sensors, pressure distribution sensors, and electronic display boards; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electricity conduits, keyboards, electronic remote control switches, and electric transformers; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, namely, blank magnetic data carriers; recording discs, namely, blank recordable optical discs; mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus; batteries