2011JB/T 7565.1-2011 Specification of flameproof three-phase asynchronous motor.Part 1:Series YB3 flameproof three-phase asynchronous motor(Frame size 63 to 355)
2004JB/T 7565.1-2004 Specification of flameproof three phases asynchronous motor Part 1: Series YB2 flameproof Three phases asynchronous motor (Frame size 63 to 355)
1999JB/T 7565-1999 Specification of YB2 series flameproof three phase asynchronous motor (frame size 63 to 355)
1994JB/T 7565-1994 YB series flameproof three-phase asynchronous motor technical conditions (frame number 355)