[IfcStructuralLoadSingleDisplacement.DisplacementY property 位移Y public IfcLengthMeasure DisplacementY { get; set; } 也可以看看 class IfcLengthMeasure class IfcStructuralLoadSingleDisplacement 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]