 |
| |||
| beneficiation; enrichment | |||
| pre-processing; pre-treatment; prior processing | |||
| pretreatment | |||
| preliminary treatment | |||
|
forbehandling : 12 a las frases, 7 temas |
| Ambiente | 1 |
| Ciencia de los materiales | 1 |
| Comunicaciones | 2 |
| Flujo de trabajo | 1 |
| General | 3 |
| Metalurgia | 3 |
| Química | 1 |