9 Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking (supervision), life-saving and teaching apparatus and instruments for conducting, switching, transforming, accumulating, regulation or controlling electricity, namely, rotational speed sensors and gas flow rate sensors; electronic regulating devices for regulating exhaust gas turbochargers of internal combustion engines; data processing apparatus and computers; apparatus for recording, transmission or reproduction of sound or images