https://mechanicaldesign101.com/wp-content/uploads/2015/03/maxresdefault.jpg7201280Prof. McCarthyhttps://mechanicaldesign101.com/wp-content/uploads/2016/07/mechanical-design-101LOGOf.pngProf. McCarthy2015-03-16 10:02:552022-09-17 09:25:552014 Energy Invitational Video