[IfcMechanicalConcreteMaterialProperties.WaterImpermeability property 防水性 public IfcText WaterImpermeability { get; set; } 也可以看看 class IfcText class IfcMechanicalConcreteMaterialProperties 命名空间 Aspose.CAD.FileFormats.Ifc.IFC2X3.Entities 部件 Aspose.CAD]
