Wims parabolic trough


 * http://wims.unice.fr/xiao/solar/index.html
 * http://wims.unice.fr/xiao/solar/diy.html
 * http://wims.unice.fr/xiao/solar/diy-en.pdf
 * http://www.termo-gen.com/pages/generators.html
 * http://www.arrickrobotics.com/robomenu/generator.html