HB 1803-1978
triangle ring (English Version)
- Standard No.
- HB 1803-1978
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Status
- Replace By
- HB 1803-1987
- Latest
- HB 1803-2000
HB 1803-1978 history
- 2000 HB 1803-2000 triangle ring
- 1970 HB 1803-1987 triangle ring
- 1970 HB 1803-1978 triangle ring
