9 Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, supervision checking, life-saving emergency and teaching apparatus and instruments, namely, cameras, optical glasses, scales, emergency signal transmitters, light diodes, electric warning lights, batteries for lighting; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electricity limiters, meters, conduits, and distribution consoles; switches, namely, power switches, light switches, electrical switches