Standard resistors, standard shunts, shunts, precision shunts, 0.01 ,0.02class shunts, 0.05 class shunts, power shunts, ultra-optical shunts, metering shunts, high-current standard resistors, widely used in electrical research Institutions, factories, schools, laboratories, and measurement and testing institutions are used as the standard for DC resistance, and can be used by power supply manufacturers and shunt manufacturers as the standard resistance of DC shunts.