6Mukhopadhyay S, Nair H, Van Der Puy M. Direct conver- sion of HCFC 225ca/cb mixture to HFC 245cb and HFC 1234yf: USA, 7470828[ P]. 2008-12-30.
7Monforte R, Caretto L. Safety issues in the application of a flammable refrigerant gas in MAC systems: the OEM per- spective [ Revised July, 2009 ] [ R ]. SAE Technical Pa- per, 2009.
8Hydrocarbons 21. com. Hydrocarbon coolers debuted at US most popular sports event [ EB/OL ]. ( 2010-02 ) [ 2014- 04 ]. http ://www. hydrocarbons21, eom/news/view/2489.