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Maleic anhydride for industrial use. Methods of test. Part 3. Determination of free acidity. Potentiometric method
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Petroleum and natural gas industries. Downhole equipment. Subsurface safety valve equipment. General technical requirements
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Associated gas processing. Small-sized block gas processing complexes. General technical requirements
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Ethylene and propylene. Method for determination of sulphur
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Mineral Admixtures for Concretes and mortars. General specifications
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