GOST R 59500-2021

Hard-facing materials. Methods of manganese determination

State system for ensuring the uniformity of measurements. Selective electron voltmeters. Methods of verification

Army dried crusts. Specifications

State system for ensuring the uniformity of measurements. Pressure gauges, vacuum pressure gauges, vacuum manometers, draught gauges, delivery head meters and draught head gauges with unified electric (current) output signals. Methods and means of verification

Air filters for general ventilation. Part 4. Conditioning method to determine the minimum fractional test efficiency

Wall stones of rocks. Specifications