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EVS-EN 50341-3-20:2007 Elektriõhuliinid vahelduvpingega üle 45 kV. Osa 3-20, Eesti siseriiklikud erinõuded = Overhead electrical lines exceeding AC 45 kV. Part 3-20, National normative aspects for Estonia
Compiler: Peeter Raesaar, Tiit Metusala, Editor: Tõnu Müürsepp, Author: Eesti Standardikeskus