 |
| поглощающий колодец: 7 phrases in 4 subjects |
| Geology | 1 |
| Hydraulic engineering | 4 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |
|
| поглощающий колодец: 7 phrases in 4 subjects |
| Geology | 1 |
| Hydraulic engineering | 4 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |