 |
| |||
| белый диск (для определения прозрачности воды) | |||
| диск Секки | |||
| disk Secchi: 14 phrases in 8 subjects |
| Biology | 1 |
| Ecology | 1 |
| Hydrography | 2 |
| Hydrology | 2 |
| Information technology | 1 |
| Natural resourses and wildlife conservation | 2 |
| Nautical | 2 |
| Navigation | 3 |
|
| |||
| белый диск (для определения прозрачности воды) | |||
| диск Секки | |||
| disk Secchi: 14 phrases in 8 subjects |
| Biology | 1 |
| Ecology | 1 |
| Hydrography | 2 |
| Hydrology | 2 |
| Information technology | 1 |
| Natural resourses and wildlife conservation | 2 |
| Nautical | 2 |
| Navigation | 3 |