 |
| air duct: 243 phrases in 37 subjects |
| Aerohydrodynamics | 7 |
| Agriculture | 1 |
| Astronautics | 7 |
| Automobiles | 6 |
| Aviation | 31 |
| Building materials | 1 |
| Cement | 2 |
| Construction | 38 |
| Ecology | 1 |
| Electronics | 6 |
| Energy industry | 15 |
| Engines | 1 |
| Firefighting and fire-control systems | 1 |
| Food industry | 1 |
| General | 7 |
| Gold mining | 1 |
| Makarov | 5 |
| Metallurgy | 4 |
| Military | 3 |
| Mining | 1 |
| Molikpaq | 1 |
| Nanotechnology | 4 |
| Nautical | 3 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 2 |
| Oilfields | 1 |
| Plumbing | 1 |
| Public utilities | 1 |
| Rail transport | 3 |
| Refrigeration | 30 |
| Road works | 1 |
| Sakhalin | 2 |
| Technology | 36 |
| Tengiz | 2 |
| Thermal engineering | 10 |
| Transport | 2 |
| Ventilation | 4 |