GB/T 4074.3 - 2008 Standard for Mechanical Property Testing of Focused Winding Wire. It specifies a series of test methods for mechanical properties of winding wire, such as specific operation procedures and evaluation criteria for tensile, bending, torsion and other tests. By implementing this standard, the performance of winding wire under mechanical stress can be accurately evaluated, providing key technical basis for mass control of winding wire production, product selection and reliable application in various electrical equipment.