GOST 31453-2013

State system for ensuring the uniformity of measurements. Procedures of measurement of mass fraction of the parent substance of reagents and superpure substances by titrimetric methods. General requirements

Soils chemically fixed with mortars based on cement and sodium silicate. Methods of testing

Energy efficiency. Air-conditioners for household purpose and similar. Indicators of energy efficiency and determination methods

Previously reduced iron ores, concentrates, agglomerates and pellets. Method for the determination of metallic iron

Shafts and openings of gas turbine engines. Landing ball and roller bearings

State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments of aerosols, suspensions and powdery materials