[IfcMechanicalSteelMaterialProperties.ProportionalStress property 比例应力 public IfcPressureMeasure ProportionalStress { get; set; } 也可以看看 class IfcPressureMeasure class IfcMechanicalSteelMaterialProperties 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
