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Steel. Metallographic characterization of duplex grain size and distribution
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Rough alexandrites. Requirements for sorting and primary classification, sorting and attestation
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Federal Law No. 219-FZ dated 21.07.2014 (with amendments as of 26.03.2022) 'On amendment of the Federal Law 'About protection of environment' and certain legislative acts of the Russian Federation'
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Federal Law "The technical regulation about safety of buildings and constructions" dated 30.12.2009 No. 384-FZ (final revision)
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Federal Law No. 96-FZ dated 04.05.1999 (with amendments as of 11.06.2021) 'On protection of atmospheric air'
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