HB 4439-1990
Hexagon socket discharge screw (English Version)
- Standard No.
- HB 4439-1990
- Language
- Chinese, Available in English version
- Release Date
- 1990
- Published By
- Professional Standard - Aviation
- Latest
- HB 4439-1990
HB 4439-1990 history
- 1990 HB 4439-1990 Hexagon socket discharge screw
