[IfcMaterialLayerSetUsage.DirectionSense property 方向感 public IfcDirectionSenseEnum DirectionSense { get; set; } 也可以看看 enum IfcDirectionSenseEnum class IfcMaterialLayerSetUsage 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
