Russian standards PDF
GOST 16598-80
Manganese ores, concentrates and agglomerates. Methods of sampling and preparation of samples for chemical analysis and determination of moisture content
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€10
GOST 16621-80
Round punches with diameter from 1 mm to 24 mm. Construction and dimensions
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€10
GOST 16698.4-93
Metallic manganese and nitrated manganese. Methods for determination of phosphorus
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€10