[IfcMechanicalFastener.NominalLength property 标称长度 public IfcPositiveLengthMeasure NominalLength { get; set; } 也可以看看 class IfcPositiveLengthMeasure class IfcMechanicalFastener 命名空间 Aspose.CAD.FileFormats.Ifc.IFC4.Entities 部件 Aspose.CAD]
