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