State system for ensuring the uniformity of measurements of the Republic of Uzbekistan. Mechanical and electromechanical labaratory weights of standard and common application. General metrological requirements. Methods of verification
State system for ensuring the uniformity of measurements of the Republic of Uzbekistan. Measuring the flow and quantity of liquids and gases by differential pressure method. Allowance for change in the inner diameter of the measuring pipe during gas flow rate measurement. Replaces RD Uz 51-059-97