Russian standards PDF
State system for ensuring the uniformity of measurements. National standards for verification procedures. General requirements for the content and design
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State system for ensuring the uniformity of measurements. Gas analysis. Conversion of gas mixture composition data
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State system for ensuring the uniformity of measurements. Permeation tubes for gases and vapors. General specifications
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State system for ensuring the uniformity of measurements. Hardness standard blocks. Verification procedure
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Automatic valves for regulation of temperature in heating devices of systems of water heating of buildings. General specifications
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Safety and control devices for burners and appliances burning gaseous or liquid fuels. Combustion product sensing devices
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