HFC-134a now is internationally recognized as one of the main refrigerant working substances to substitute Refrigerant gas R134a ,1,1,1,2-Tetrafluoroethane ,used in auto air condition,refrigerator,central air-condition.R-134a has been widly used as refrigerant in car ,super-market freezer,reach-in-coolers,display cases, auto air-conditions,refrigerators,cenrel air conditions,commercial ...