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Hard coal and coke. Mechanical sampling. Part 6. Coke. Preparation of test samples

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Petroleum and natural gas industries. Reciprocating compressors

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Non-metallic ore materials. Preparation of standard solutions and solutions for blank tests

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Pipes for use as casing or tubing and couplings for them. Basic parameters and inspection of thread connections. General technical requirements

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Concentrated kaolin. Method for determination of potassium and sodium oxides

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Hydrochloric acid for industrial use. Determination of total acidity of titrimetric method

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