| |||
| extracción por túnel; minería a base de pozos | |||
|
extraction souterraine : 4 phrases in 3 subjects |
| Environment | 1 |
| Medical | 1 |
| Water resources | 2 |
| |||
| extracción por túnel; minería a base de pozos | |||
|
extraction souterraine : 4 phrases in 3 subjects |
| Environment | 1 |
| Medical | 1 |
| Water resources | 2 |