HB 1685-1987
Eccentric square back-up board (English Version)
- Standard No.
- HB 1685-1987
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Latest
- HB 1685-1987
HB 1685-1987 history
- 1970 HB 1685-1987 Eccentric square back-up board
