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