Abstract
Results of international key comparisons of the national standard for air flow rate and the working standard for water volumetric and mass flow rate are provided. Comparisons were made in 2009 within the framework of the Asia-Pacific Metrological Program (APMP) international organization. Russia was represented by state special standard for the unit of air flow rate (GET 150–85) and the highest accuracy working standard for the unit of water volumetric mass flow rate (RE VT 6–98). Results of comparison point to conformity of the metrological properties of these standards to the world level.
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