This standard specifies the main structural dimension series of instrument cabinets and instrument boxes. The main structural dimension series specified in this standard are applicable to instrument cabinets, rack-mounted instrument boxes and their panels and plug-in boxes, as well as desktop instrument boxes and portable instrument boxes.
JB/T 9265-1999 history
1999JB/T 9265-1999 Main construction dimension sersie of instrument cabinets and chassis