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GOST 17818.4-90
Graphite. Method for determination of ash content
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GOST R 53718-2009
Aviation fuels. Method of smoke point determination
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GOST R 53681-2009
Flare parts for general refinery and petrochemical service. General technical requirements
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GOST 14048.4-78
Zinc concentrates. Methods for determination of silicon dioxide
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