Research on the Metallurgical Behaviour of X70 Steel subjected to Multi-Wire Submerged Arc Welding - Voiculescu, I.; Geanta, V.; Rusu, C. C.; Mircea, O.; Mistodie, L. R.; Scutelnicu, E. (Annals of “Dunarea de Jos” University of Galati. Fascicle XII, Welding Equipment and Technology, 2016)