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A new circulation-type vapor–liquid equilibrium (VLE) apparatus was developed, and two binary systems of pentafluoroethane (R125)+propane (R290) and pentafluoroethane (R125)+1,1,1,2,3,3,3-heptafluoropropane (R227ea) were measured. The estimated uncertainties of the measured data are ±0.005K for temperatures, ±600Pa for pressures, and ±0.001 for mole fractions for both the liquid and vapor phases....
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