HB 4397-1989
Numeric steel seal (English Version)
- Standard No.
- HB 4397-1989
- Language
- Chinese, Available in English version
- Release Date
- 1990
- Published By
- Professional Standard - Aviation
- Latest
- HB 4397-1989
- Replace
- HB 3099-1977
HB 4397-1989 history
- 1990 HB 4397-1989 Numeric steel seal
- 1979 HB 3099-1977 steel seal
