SCIENTIFIC, NAUTICAL, SURVEYING, ELECTRIC, PHOTOGRAPHIC, CINEMATOGRAPHIC, OPTICAL, WEIGHING, MEASURING, SIGNALLING, CHECKING (SUPERVISION), LIFE-SAVING AND TEACHING APPARATUS AND INSTRUMENTS; 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 EQUIPMENTS AND COMPUTERS; FIRE-EXTINGUISHING APPARATUS