.AixLib.Fluid.Movers.PumpsPolynomialBased.PumpHeadControlled.efficiencyCharacteristic .AixLib.Fluid.Movers.PumpsPolynomialBased.PumpHeadControlled.efficiencyCharacteristicfunction efficiencyCharacteristic = AixLib.Fluid.Movers.PumpsPolynomialBased.BaseClasses.efficiencyCharacteristic.Wilo_Formula_efficiency;