2015JB/T 7841-2015 Technical specifications of electromagnetic brake three-phase asynchronous motors for YZZ series elevators
2005JB/T 7841-2005 Technical specification for YZZ range of electromagnetic branking Three-phase induction motors for elevator
1995JB 7841-1995 Technical specifications of electromagnetic brake three-phase motors for YZZ series elevators
JB 7841-1995 Technical specifications of electromagnetic brake three-phase motors for YZZ series elevators was changed to JB/T 7841-2005 Technical specification for YZZ range of electromagnetic branking Three-phase induction motors for elevator.