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Information × Registration Number 0121U111759, ( 0222U000911  ) R & D request Title Research of stability of reproduction and storage of units of measurement by the state primary standards stored in the state enterprise "Research institute of metrology of measuring and control systems" Head Shpak Oleksandr V., Registration Date 22-06-2021 Organization State scientific-research institute of metrology of measuring and control systems popup.description1 Investigation of the stability of reproduction and storage of units of measurement by state primary standards during their maintenance and operation to ensure the unity and traceability of measurements of the unit of sound pressure in the air, the unit of ultrasonic pressure in the aquatic environment and the unit of ultrasonic power in the aquatic environment popup.nrat_date 2024-12-09 Close