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Petroleum and natural gas industries. Drilling and production equipment. Subsurface barrier valves and related equipment. General technical requirements

Document status: Active

Zinc concentrates. Method for the determination of aluminium oxide

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Alumina. Method for the crystallooptic determination of aluminium oxide alpha-modification

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Kuznetsk Basin coals and Gorlovsky Basin anthracite for stratified burning. Specifications

Document status: Cancelled

Surface active agents. Determination of stability in hard water

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Essential oils. Quantitative evaluation of residue on evaporation

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