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| Standard Insuued on: 1991-04 |
TB/T 447-1990 Technical specification for the solid manganese steel frogs
高锰钢辙叉技术条件
| Category No.: | TB | Valid Status: | superseded |
| Issued Organization: | Issued Date: | 1991-04-19 | |
| Implemented Date: | 1992-8-30 | Abolished Date: | |
| Superseded Standard.: | TB/T 447-2004 Technical specification for the solid manganese steel frogs |
Superseded Date: | 2004-10-23 |
GB/T 12792-1991
YBJ 227-1991
GB/T 12846-1991
GB/T 12801-2008
GB 12835-2001
TB/T 447-1990
YS/T 13-1991
YS/T 14-1991
GB/T 13180-1991
GB/T 13179-1991
GB/T 13178-1991
GB/T 13181-1991
GB/T 13182-1991
GB/T 12825-1991
GB/T 2942-1991
GB/T 3780.21-1991
GB/T 12839-1991
GB/T 1681-1991
GB/T 12828-1991
GB/T 533-1991
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