| |||
| ripple marks | |||
| current ripple; ripple mark; sand ripple | |||
| |||
| riffler file (wikipedia.org maxim_nesterenko) | |||
| riffle (перегородка в шлюзе MichaelBurov) | |||
| ripple (донный); riffle (донный) | |||
| bed ripple; dune; sand wave | |||
| ripple; riffle | |||
| |||
| riffle; ripple | |||
|
рифели : 13 phrases in 7 subjects |
| Agriculture | 1 |
| Hydraulic engineering | 1 |
| Hydrography | 2 |
| Hydrology | 6 |
| Natural resourses and wildlife conservation | 1 |
| Technology | 1 |
| Water resources | 1 |