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