Russian standards PDF
Optics and photonics. Microchannel plates. Terms, definitions and letters
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Optics and photonics. Liquid coolants for solid-state lasers. General safety requirements
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Water quality. Methods for determining sanitary-microbiological and sanitary-parasitological indicators for assessing water in surface water bodies and wastewater
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Water quality. Sanitary-virological methods of water research
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Automobile roads of general use. Sand-gravel mixes. General technical requirements
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