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GOST 8.383-1980 State system for ensuring the uniformity of measurements. State tests of means for measurements. General statements
GOST 891-1975 Paper and board for textile spools and tapers. Specifications
GOST 9.401-1991 Unified system of corrosion and ageing protection. Paint coatings. General requirements and methods of accelerated tests on resistance to the action of climatic factors*, 1991-04-19 Update
ISO 387:1977 Hydrometers; Principles of construction and adjustment
GOST 18481-1981 history
1981GOST 18481-1981 Glass hydrometers and cylinders. General specifications