[IfcActuator.PredefinedType property PredefinedType public IfcActuatorTypeEnum PredefinedType { get; set; } 也可以看看 enum IfcActuatorTypeEnum class IfcActuator 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]