 |
|
drainless basin : 6 phrases in 4 subjects |
| Agriculture | 2 |
| Engineering geology | 1 |
| Hydroelectric power stations | 2 |
| Technology | 1 |
|
|
drainless basin : 6 phrases in 4 subjects |
| Agriculture | 2 |
| Engineering geology | 1 |
| Hydroelectric power stations | 2 |
| Technology | 1 |