May 19, 2016 Christophe Image published in: Solar thermodynamic Image available in: 350 x 176 / 150 x 150 / 300 x 151 / 350 x 176 / 350 x 176 / 350 x 176 / 350 x 176 / 50 x 25 / 150 x 75 / 250 x 126