.ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_advanced.PressureLoss .ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_advanced.PressureLossmodel PressureLoss = ClaRa.Basics.ControlVolumes.Fundamentals.PressureLoss.Generic_PL.NoFriction_L2;