2005JB/T 5869-2005 Technical specification for YBZS range of flame-proof double-speed three-phase induction motors for crane application
1991JB 5869-1991 Specifications for YBZS series flameproof two-speed three-phase asynchronous motors for hoisting
JB 5869-1991 Specifications for YBZS series flameproof two-speed three-phase asynchronous motors for hoisting was changed to JB/T 5869-2005 Technical specification for YBZS range of flame-proof double-speed three-phase induction motors for crane application.