This standard specifies the technical requirements, testing rules, packaging and marking of operating parts. This standard applies to the handles specified in national standards; handle balls, sleeves, rods; handle seats; handwheels; handles; nesting and other operating parts.
JB/T 7277-1994 history
2014JB/T 7277-2014 Specification of operating handle, handwheel and knob
1994JB/T 7277-1994 Technical specification for actuators