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Pneumatic rock drills. General technical requirements
Document status: Cancelled
Super pure chemicals. Concentration of microimpurities by evaporation
Document status: Replaced by GOST 27565-2019
Reagents. General requirements for methods of analysis of anions impurities
Document status: Active
Methods for the petrographic analysis of coals. Part 5. Method of determining microscopically the reflectance of vitrinite
Document status: Active