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National Annex to SP RK EN 1999-1-1:2007+А1:2009/2011 Design of aluminium structures. Part 1-1. General structural rules

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Indoor plumbing systems

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Wind farms designing

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Laying utility lines using horizontal directional drilling

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Construction climatology (amd. 01.04.2019 - 46-NK)

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National Annex to SP RK EN 1991-1-4:2005/2011 Actions on structures. Part 1-4. General actions. Wind actions

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