[IfcOpticalMaterialProperties.VisibleTransmittance property 可见透射率 public IfcPositiveRatioMeasure VisibleTransmittance { get; set; } 也可以看看 class IfcPositiveRatioMeasure class IfcOpticalMaterialProperties 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
