State system for ensuring the uniformity of measurements. Acoustics. Reference zero for the calibration of audiometric equipment. Part 1. Reference equivalent threshold sound pressure levels of pure tones for supra-aural earphones
Forest protection. Special protective clothing for extinguishing forest and other landscape (wildland) fires. General technical requirements. Control methods
Premixes. Determination of vitamins: B1 (thiaminchloride), B2 (riboflavin), B3 (pantothenic acid), B5 (nicotinic acid and nicotinamide), B6 (pyridoxine), Bc (folic acid), C (ascorbic acid) content by method of capillary electrophoresis
