Keywords: Helfaut Generatrice 28 10 2011 2.jpg en Electric generator diesel engine and alternator installed in the underground worksite of the Coupole d'Helfaut in 1944 making the site autonomous in energy terms own Vassil 2011-10-28 Cc-zero QualityImage Coupole d'Helfaut Diesel generators Quality images by Vassil Quality images of Pas-de-Calais |