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