.TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.vapourIsothermalCompressibility_phxi .TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.vapourIsothermalCompressibility_phxipartial function vapourIsothermalCompressibility_phxi = TILMedia.BaseClasses.PartialVLEFluidObjectFunctionPrototypes.vapourIsothermalCompressibility_phxi;