[IfcCurrencyRelationship.RateSource property RateSource public IfcLibraryInformation RateSource { get; set; } 也可以看看 class IfcLibraryInformation class IfcCurrencyRelationship 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
