[IfcClassificationItem.Notation property 符号 public IfcClassificationNotationFacet Notation { get; set; } 也可以看看 class IfcClassificationNotationFacet class IfcClassificationItem 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
