Nitric acid for industrial use. Determination of sulphated ash. Gravimetric method
Document status: Active
Methods for the petrographic analysis of coals. Part 5. Method of determining microscopically the reflectance of vitrinite
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Brown coals, hard coals and anthracite of the North-East regions for stratified burning. Specifications
Document status: Cancelled
Titanomagnetite ores, ironvanadium concentrates, agglomerates and pellets. Methods for determination of vanadium pentoxide
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