 |
| |||
| 碱性氧气转炉钢 | |||
| 氧气吹炼钢 | |||
| 碱性氧吹钢; 氧气顶吹转炉钢 | |||
|
basic oxygen steel : 7 a las frases, 4 temas |
| Ciencias de la tierra | 1 |
| General | 2 |
| Metalurgia | 3 |
| Tecnología | 1 |
|
| |||
| 碱性氧气转炉钢 | |||
| 氧气吹炼钢 | |||
| 碱性氧吹钢; 氧气顶吹转炉钢 | |||
|
basic oxygen steel : 7 a las frases, 4 temas |
| Ciencias de la tierra | 1 |
| General | 2 |
| Metalurgia | 3 |
| Tecnología | 1 |