2005QJ 1931.5A-2005 The drawing rules of electrical diagrams--Part 5: Connection diagram
1990QJ 1931.6-1990 Electrical schematic drawing rule unit wiring diagram
QJ 1931.6-1990 Electrical schematic drawing rule unit wiring diagram was changed to QJ 1931.5A-2005 The drawing rules of electrical diagrams--Part 5: Connection diagram.