HB 4321-1989
Square lower padding block (English Version)
- Standard No.
- HB 4321-1989
- Language
- Chinese, Available in English version
- Release Date
- 1989
- Published By
- Professional Standard - Aviation
- Latest
- HB 4321-1989
HB 4321-1989 history
- 1989 HB 4321-1989 Square lower padding block
