.TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourIsothermalCompressibility_pTxi .TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourIsothermalCompressibility_pTxipartial function vapourIsothermalCompressibility_pTxi = TILMedia.BaseClasses.PartialVLEFluidFunctionPrototypes.vapourIsothermalCompressibility_pTxi;