HB 1689-1987
Eccentric rectangular back-up board (English Version)
- Standard No.
- HB 1689-1987
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Latest
- HB 1689-1987
HB 1689-1987 history
- 1970 HB 1689-1987 Eccentric rectangular back-up board
