 |
| combustion: 1134 phrases in 42 subjects |
| Agriculture | 4 |
| Analytical chemistry | 14 |
| Armored vehicles | 23 |
| Astronautics | 119 |
| Astronomy | 5 |
| Automobiles | 4 |
| Aviation | 216 |
| Bioenergy | 4 |
| Business | 2 |
| Chemistry | 104 |
| Cinematography | 1 |
| Construction | 4 |
| Cosmetics and cosmetology | 2 |
| Dentistry | 2 |
| Electronics | 1 |
| Engines | 3 |
| Environment | 6 |
| Food industry | 1 |
| Forestry | 9 |
| General | 4 |
| Geology | 3 |
| Mechanic engineering | 15 |
| Medical | 5 |
| Metallurgy | 44 |
| Meteorology | 1 |
| Military | 6 |
| Mining | 18 |
| Missiles | 6 |
| Natural resourses and wildlife conservation | 56 |
| Nuclear physics | 3 |
| Oil / petroleum | 1 |
| Oil and gas | 1 |
| Oil and gas technology | 9 |
| Photography | 1 |
| Physics | 7 |
| Politics | 1 |
| Polygraphy | 3 |
| Technology | 327 |
| Textile industry | 3 |
| Trucks/Lorries | 91 |
| United Nations | 3 |
| Радиоактивное излучение | 2 |