HB 257-1973
HB 241-70, HB 243-70 HB 243-70 threaded bottom hole with smooth plug gauge application size M1~M120, AG3~AG30 (English Version)
- Standard No.
- HB 257-1973
- Language
- Chinese, Available in English version
- Published By
- Professional Standard - Aviation
- Status
- Replace By
- HB 257-2002
- Latest
- HB 257-2002
HB 257-1973 history
- 1970 HB 257-2002
- 1970 HB 257-1973 HB 241-70, HB 243-70 HB 243-70 threaded bottom hole with smooth plug gauge application size M1~M120, AG3~AG30
