[IfcEllipse.SemiAxis1 property SemiAxis1 public IfcPositiveLengthMeasure SemiAxis1 { get; set; } 也可以看看 class IfcPositiveLengthMeasure class IfcEllipse 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
