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Insulating mineral oils. Determination of interfacial tension of oil against water by the ring method
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Cosmetics. Methods for determination of free and tied alkali
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Brown coals, hard coals, anthracites, coal briquettes and combustible shales. Methods for the determination of mineral impurities (rock) and smalls
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Hard coal and coke. Mechanical sampling. Part 6. Coke. Preparation of test samples
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Goods of household chemistry. General technical requirements
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