WOLFRAM SYSTEM MODELER
    dDewDensity_dPressureReturn dew point density derivative  | 
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SystemModel["Modelica.Media.Interfaces.PartialTwoPhaseMedium.dDewDensity_dPressure"]

| sat | 
         Type: SaturationProperties Description: Saturation property record  | 
    
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| ddvdp | 
         Type: DerDensityByPressure (s²/m²) Description: Saturated steam density derivative  | 
    
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         Modelica.Media.Water.WaterIF97_base Dew point density derivative  | 
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         Modelica.Media.R134a.R134a_ph Derivative of vapor density in two-phase region w.r.t. pressure  |