[IfcPresentationLayerAssignment.Identifier property 标识符 public IfcIdentifier Identifier { get; set; } 也可以看看 class IfcIdentifier class IfcPresentationLayerAssignment 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
