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Unified system for design documentation. Basic requirements for drawings
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High efficiency air filters ЕРА, HEPA and ULPA. Part 1. Classification, performance testing, marking
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Optics and photonics. Microchannel plates. Terms, definitions and letters
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State system for ensuring the uniformity of measurements. Gangs callipers with reading arrangement. Methods and means for verification
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The preservation of cultural heritage. Terms and definitions. Part 2. Monuments of history and culture
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