9 Scientific apparatus and instruments, namely, prisms for scientific purposes, optical mirrors, conductivity meters; nautical apparatus and instruments, namely, marine depth finders, marine radio communication machines and apparatus; surveying machines and instruments; photographic apparatus and instruments, namely, photographic filters, photographic cameras, photographic projectors; cinematographic apparatus and instruments, namely, cinematographic cameras, cinematographic projectors, sound recording apparatus and instruments; optical apparatus and instruments, namely, optical discs drives, optical filters, optical lens sights, optical inspection apparatus for industrial use; weighing apparatus and instruments, namely, scales and balances, weight belts for diving; measuring apparatus and instruments, namely, laser measuring systems, instruments for measuring length, digitizers, tape measures; signaling apparatus and instruments, namely, digital signal processors, emergency signal transmitters, traffic light apparatus; checking and supervision apparatus and instruments, namely, graduation checkers, apparatus for checking flight parameters; life-saving apparatus and instruments, namely, life belts, life jackets, life-saving rafts; teaching apparatus and instruments, namely, medical teaching mannequins; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers; blank recording discs; automatic vending machines; mechanism for coin-operated apparatus, namely, coin acceptors for separating goods coins from counterfeits; coin counting or sorting machines; cash registers; calculating machines, namely, calculators, calculating scales; data processors and computers; fire-extinguishers