| 摘要 |
This invention provides a heat transfer composition comprising from about 5 to about 40 % by weight of trans -1,3,3,3-tetrafluoropropene (R-1234ze(E)), from about 20 to about 35 % by weight difluoromethane (R-32), from about 15 to about 30 % by weight R-125 pentafluoroethane (R-125), and from about 12 to about 50 % by weight 1,1,1,2-tetrafluoroethane (R-134a). |
