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4. Normative documents for engineering equipment of buildings and structures and external networks


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Letter 10279-OG/16
On the direction of the letter FAU "FTS" from 17.05.2022 N Ex-2949
Letter 4345-OG/00
About the presence of a typo in SP 30.13330.2020
Letter Ish-2949
On the application of the provisions of SP 60.13330.2020
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