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AGGM Austrian Gas Grid Management AG
From <a rel="nofollow" class="external text" href="http://www.aggm.at/files/get/28df395deca86db0886e8b40ef2f2a8a/AGGM_GB_2015_DRUCKVERSION_WEB_DE.pdf">PDF</a>, converted to SVG with pdf2svg and extracted with Inkscape.