HB 1731-1987
transition key (English Version)
- Standard No.
- HB 1731-1987
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Latest
- HB 1731-1987
- Replace
- HB 1257-1975
HB 1731-1987 history
- 1970 HB 1730-1987 small transition key
- 0000 HB 1257-1975
