GB/T 221-1979
Notations for markings of iron and steel products
2000-11
- Standard No.
- GB/T 221-1979
- Language
- Chinese
- Release Date
- 1979
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Replace By
- GB/T 221-2000
- Lastest
- GB/T 221-2008
GB/T 221-1979 history
- 2008 GB/T 221-2008 Notations for designations of iron and steel
- 2000 GB/T 221-2000 Notations for designations of iron and steel
- 1979 GB/T 221-1979 Notations for markings of iron and steel products