 |
| loading surface: 13 phrases in 8 subjects |
| Astronautics | 4 |
| Construction | 1 |
| Ecology | 1 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 3 |
| Water resources | 1 |
| Water supply | 1 |
|
| loading surface: 13 phrases in 8 subjects |
| Astronautics | 4 |
| Construction | 1 |
| Ecology | 1 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 3 |
| Water resources | 1 |
| Water supply | 1 |