[IfcDimensionCurveTerminator.Role property 角色 public IfcDimensionExtentUsage Role { get; set; } 也可以看看 enum IfcDimensionExtentUsage class IfcDimensionCurveTerminator 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]