 |
| subsoil water: 7 phrases in 6 subjects |
| Construction | 1 |
| Diplomacy | 1 |
| Firefighting and fire-control systems | 1 |
| Hydrology | 1 |
| Mining | 1 |
| Natural resourses and wildlife conservation | 2 |
|
| subsoil water: 7 phrases in 6 subjects |
| Construction | 1 |
| Diplomacy | 1 |
| Firefighting and fire-control systems | 1 |
| Hydrology | 1 |
| Mining | 1 |
| Natural resourses and wildlife conservation | 2 |