[IfcMaterialClassificationRelationship.ClassifiedMaterial property 分类材料 public IfcMaterial ClassifiedMaterial { get; set; } 也可以看看 class IfcMaterial class IfcMaterialClassificationRelationship 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
