State system for ensuring the uniformity of measurements. Measurement of liquids and gases flow rate and quantity by differential pressure method. Orifice plates, nozzles ISA 1932 and Venturi tubes inserted in circular cross-section filled conduits. Specifications
Appliance couplers for household and similar general purposes. Part 2-2. Particular requirements for interconnection couplers for household and similar equipment. Requirements and methods of tests
