The ExOne Company (Nasdaq: XONE) announced that it has appointed Karlebo Gjuteriteknik AB as its sales representative in Scandinavian countries for its 3D printing machines and the 3D printing of parts. Karlebo, a part of Beijer Tech AB, represents some of the world's leading manufacturers and specializes in machinery for surface treatment, foundry, and steelworks and smelters for companies in the Nordic…