HB 481-1989
Rectangular long base plate (column 300×300) (English Version)
- Standard No.
- HB 481-1989
- Language
- Chinese, Available in English version
- Release Date
- 1989
- Published By
- Professional Standard - Aviation
- Latest
- HB 481-1989
HB 481-1989 history
- 1989 HB 481-1989 Rectangular long base plate (column 300×300)
- 1970 HB 481-1974 Rectangular long base plate (column 300×300)
