[IfcBuildingSystem.PredefinedType property PredefinedType public IfcBuildingSystemTypeEnum PredefinedType { get; set; } 也可以看看 enum IfcBuildingSystemTypeEnum class IfcBuildingSystem 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
