 |
| |||
| benching; stepped excavation | |||
| bench stoping; stoping | |||
|
exploitation par gradins : 15 a las frases, 3 temas |
| Carbón | 11 |
| General | 1 |
| Metalurgia | 3 |
|
| |||
| benching; stepped excavation | |||
| bench stoping; stoping | |||
|
exploitation par gradins : 15 a las frases, 3 temas |
| Carbón | 11 |
| General | 1 |
| Metalurgia | 3 |