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GOST 9-92 Types A, B. Contains 25% of nitrogen |
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GOST 2-2013 Type B. Contains 34.4% of nitrogen |
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GOST 6221-90, Types A, Ak, B. Contains 82.3 per cent of nitrogen. |
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TU 2182-15-002-064-86-2000. Contains 85% of calcium carbonate |
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GOST 5583-78 Contains oxygen 99.7% |
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TU 2186-031-00206486-2013 |
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