CLS: A low cost visualization environment for the train industry Diego Gutiérrez, Francisco J. Serón, Juan A. Magallón, Emilio J. Sobreviela and José A. Gutiérrez Mécanique & Industries, 5 2 (2004) 139-145 Published online: 29 April 2004 DOI: 10.1051/meca:2004014