 |
| |||
| underground mining; underground winning; underground work | |||
|
exploitation en mine : 1 a las frases, 1 temas |
| Metalurgia | 1 |
|
| |||
| underground mining; underground winning; underground work | |||
|
exploitation en mine : 1 a las frases, 1 temas |
| Metalurgia | 1 |