HB 506-1974
Column (300×600×300) (English Version)
- Standard No.
- HB 506-1974
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Status
- 1989-12
- Replace By
- HB 506-1989
- Latest
- HB 506-1989
HB 506-1974 history
- 1989 HB 506-1989 Column (300×600×300)
- 1970 HB 506-1974 Column (300×600×300)
