VideosPerrelet Peripheral Double Rotor Friday, 14 December 2012 By Christophe Roulet close Christophe RouletEditor-in-chief, HH Journal“The desire to learn is the key to understanding.”“Thirty years in journalism are a powerful stimulant for curiosity”. Read More CLOSEView Profile 1 min watch X Play tagsNovelties 2012Perrelet