 |
| |||
| feed heating system; condensate system; regenerative system | |||
| регенеративная система: 20 phrases in 10 subjects |
| Astronautics | 5 |
| Aviation medicine | 1 |
| Firefighting and fire-control systems | 1 |
| Military | 1 |
| Nanotechnology | 3 |
| Nautical | 1 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Solar power | 1 |
| Thermal engineering | 5 |