 |
| |||
| recording rate (эхолотом) | |||
|
скорость записи глубин : 4 phrases in 3 subjects |
| Hydrology | 1 |
| Navigation | 2 |
| Water resources | 1 |
|
| |||
| recording rate (эхолотом) | |||
|
скорость записи глубин : 4 phrases in 3 subjects |
| Hydrology | 1 |
| Navigation | 2 |
| Water resources | 1 |