JB/T 7078-1993 Technical specifications of YZRF, YZRG series hoisting and metallurgical three-phase asynchronous motors with forced ventilation type wound rotor (English Version)
2014JB/T 7078-2014 Specifications for YZRF and YZRG series forced-ventilated wound-rotor three-phase induction motors for crane and metallurgical applications
2002JB/T 7078-2002 Technical specifications for YZRF and YZRG range of forced-ventilated wound-rotor three-phase induction motors for crane and metallurgical application
1970JB/T 7078-1993 Technical specifications of YZRF, YZRG series hoisting and metallurgical three-phase asynchronous motors with forced ventilation type wound rotor