[IfcMaterialUsageDefinition.AssociatedTo property AssociatedTo public IfcCollection<IfcRelAssociatesMaterial> AssociatedTo { get; } 也可以看看 class IfcCollection<T> class IfcRelAssociatesMaterial class IfcMaterialUsageDefinition 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
