QJ 1931.4-1990
Electrical schematic drawing rules circuit diagram (English Version)
- Standard No.
- QJ 1931.4-1990
- Language
- Chinese, Available in English version
- Release Date
- 1990
- Published By
- Professional Standard - Aerospace
- Status
- 2005-07
- Replace By
- QJ 1931.4A-2005
- Latest
- QJ 1931.4A-2005
QJ 1931.4-1990 history
- 2005 QJ 1931.4A-2005 The drawing rules of electrical diagrams--Part 4: Circuit diagram
- 1990 QJ 1931.4-1990 Electrical schematic drawing rules circuit diagram
- 1970 QJ 20-1981
