air/ fuel ratio : 91 phrases in 23 subjects |
Armored vehicles | 2 |
Astronautics | 3 |
Automated equipment | 1 |
Automobiles | 5 |
Aviation | 5 |
Combustion gas turbines | 2 |
Ecology | 2 |
Electrical engineering | 2 |
Electronics | 1 |
Energy industry | 12 |
Firefighting and fire-control systems | 4 |
Makarov | 2 |
Metallurgy | 2 |
Military | 4 |
Nanotechnology | 5 |
Nautical | 3 |
Oil / petroleum | 1 |
Rail transport | 2 |
Shipbuilding | 1 |
Technology | 22 |
Thermal engineering | 5 |
Transport | 4 |
Weapons of mass destruction | 1 |