HB 1817-1978
vertical axis (English Version)
- Standard No.
- HB 1817-1978
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Status
- Replace By
- HB 1817-1987
- Latest
- HB 1817-2000
HB 1817-1978 history
- 2000 HB 1817-2000 vertical axis
- 1970 HB 1817-1987 vertical axis
- 1970 HB 1817-1978 vertical axis
