[IfcFeatureElementSubtraction.VoidsElements property VoidsElements public IfcRelVoidsElement VoidsElements { get; } 也可以看看 class IfcRelVoidsElement class IfcFeatureElementSubtraction 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
