[IfcApprovalPropertyRelationship.Approval property 批准 public IfcApproval Approval { get; set; } 也可以看看 class IfcApproval class IfcApprovalPropertyRelationship 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
