9 Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking, supervision, life-saving and teaching apparatus and instruments, namely, computers, cameras and optical lenses; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electrical switches, electrical cables, transformers, capacitors, and regulators; apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers, mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus