| 摘要 |
1404431 Turbines E I DU PONT DE NEMOURS & CO 21 Feb 1973 122 Feb 1972 2 Jan 1973] 8501/73 Heading FIT [Also in Division F4] In a refrigerating and heating apparatus comprising a turbine, examples of working fluids are 1,1,2-trichloro-1,2,2-trifluoroethane as the refrigerant and benzotrifluoride as a suitable mixture of tetrachloroethylene and trichloroethylene. |
