QJ 501-1980
(English Version)
- Standard No.
- QJ 501-1980
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aerospace
- Status
- Replace By
- QJ 501-1989
- Latest
- QJ 501-1989
QJ 501-1980 history
- 1970 QJ 501-1989
- 1970 QJ 501-1980
