.ThermoSysPro.Units.SI.ComplexPotentialDifference .ThermoSysPro.Units.SI.ComplexPotentialDifferenceComplex electric potential difference
operator record ComplexPotentialDifference = Complex(redeclare ThermoSysPro.Units.SI.PotentialDifference re, redeclare ThermoSysPro.Units.SI.PotentialDifference im);