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High purity substances. Method for concentration of microimpurities by extraction
Document status: Replaced by GOST 27868-2019
Benzene hydrocarbons and allied products. Method of determination of thiophene content in benzene
Document status: Active
Peat and products of its processing for agriculture. Method for determination of hydrolytic acidity
Document status: Active
Underground mines. Explosion prevention and protection systems. Equipment and protective systems for firedamp drainage
Document status: Active