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