 |
| subsurface water: 29 phrases in 13 subjects |
| Agriculture | 2 |
| Astronautics | 1 |
| Ecology | 5 |
| Environment | 1 |
| Firefighting and fire-control systems | 1 |
| Geology | 1 |
| Hydrology | 2 |
| Makarov | 6 |
| Oil / petroleum | 3 |
| Oilfields | 1 |
| Public utilities | 1 |
| Remote sensing | 1 |
| Technology | 4 |
|
| subsurface water: 29 phrases in 13 subjects |
| Agriculture | 2 |
| Astronautics | 1 |
| Ecology | 5 |
| Environment | 1 |
| Firefighting and fire-control systems | 1 |
| Geology | 1 |
| Hydrology | 2 |
| Makarov | 6 |
| Oil / petroleum | 3 |
| Oilfields | 1 |
| Public utilities | 1 |
| Remote sensing | 1 |
| Technology | 4 |