State system for ensuring the uniformity of measurements of the Republic of Uzbekistan. Measurements of the flow and quantity of liquids and gases by differential pressure method. Determination of the correction factor for blunting of the leading edge of the aperture of a diaphragm. Replaces RD Uz 51-072-98, RD Uz 51-059-97
State standardization system of the Republic of Uzbekistan. The procedure for development, coordination, approval and registration, the technical description of the standard samples