HB 1802-1987
Trapezoid ring (English Version)
- Standard No.
- HB 1802-1987
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Status
- 2001-01
- Replace By
- HB 1802-2000
- Latest
- HB 1802-2000
HB 1802-1987 history
- 2000 HB 1802-2000 Trapezoid ring
- 1970 HB 1802-1987 Trapezoid ring
- 1970 HB 1802-1978 Trapezoid ring
