Sound broadcasting digital. Coding of signals of sound broadcasting with reduction of redundancy for transfer on digital communication channels. A part III (MPEG-4 audio). General audio coding (GA) - AAC, TwinVQ, BSAC
State system for ensuring the uniformity of measurements. Certified reference materials for metrological maintenance of pipeline non-destructive testing equipment. General requirements
Wheelchairs. Part 21. Requirements and test methods for electromagnetic compatibility of electrically powered wheelchairs and scooters, and battery chargers
