 |
| heat engine: 36 phrases in 18 subjects |
| Apollo-Soyuz | 1 |
| Armored vehicles | 1 |
| Astronautics | 4 |
| Aviation | 2 |
| Construction | 1 |
| Energy industry | 3 |
| General | 1 |
| Mathematics | 1 |
| Mechanic engineering | 2 |
| Military | 5 |
| Nanotechnology | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Refrigeration | 1 |
| Shipbuilding | 1 |
| Solar power | 4 |
| Technology | 4 |
| Transport | 2 |