Read Refrigeration book Hindi and English, I will make an online Electromechanical course for make you an Engineers. This application is made to provide proper information about air conditioner and refrigeration system, In this refrigeration knowledge book, parts of VRV, VRF, Multi System etc. machines and refrigerant calculation, where and why the parts used in them have been used, and From time to time, updates are also done about each and every part.