GOST 20421-75

Noise emitted by machinery. Determination of emission sound pressure levels at the work station and at other specified positions using sound intensity. Engineering method

The joints of rails and switches welded. Nondestructive inspection methods

Fruit and vegetable products. Determination of titratable acidity

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

Gas heated catering equipment. Part 2-6. Specific requirements. Hot water heaters for beverage

Tungsten concentrate. Determination of copper and lead by atomic-absorption method