Mechanical engineering



https://docs.google.com/presentation/d/1-PiWA7FEwgANItwHLg7s1PluO4fJ8DmQMpJo2sTtfUU/edit?usp=sharing_eid&invite=CNCXiIcP

                                 

This book about, the solar energy, how we can use it in our life ,what's the useful of it. The solar   energy is a new energy. The solar energy is an  Economic energy. This is very nice book. Now , I have some information about the solar energy. This is very simple and Wonderful book. Thank you.