Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments, namely, Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electric current, Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current, remote controlling and measuring of electric current, temperature and humidity, environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and electric current, apparatus for giving and synchronizing time; time clocks; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electric switches, electric meters, electric sensors, electrical power distribution units, power line conditioners, Transient voltage surge suppressors with power conditioning technology, remote controlling and measuring of electric current, temperature and humidity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus