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State system for ensuring the uniformity of measurements. Reference systems for certification reference materials composition of magistral natural gas and substitute natural gas. The method of verification
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Food additives. Sodium acetates E262. General specifications
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Dry building leveling plaster mixes based on gypsum binder. Specifications
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Petroleum and natural gas industry. Subsea production systems. Explosive atmospheres. Electrostatic hazаrd. Tests
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Medical electrical equipment. Microwave therapy equipment. Technical condition control methods
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