 |
|
recirculating system : 25 phrases in 13 subjects |
| Animal husbandry | 1 |
| Automated equipment | 2 |
| Ecology | 1 |
| Energy industry | 2 |
| Fish farming pisciculture | 2 |
| General | 4 |
| Industry | 2 |
| Mechanics | 1 |
| Molikpaq | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Technology | 4 |
| Thermal engineering | 2 |