[IfcMechanicalMaterialProperties.PoissonRatio property 泊松比 public IfcPositiveRatioMeasure PoissonRatio { get; set; } 也可以看看 class IfcPositiveRatioMeasure class IfcMechanicalMaterialProperties 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
