return air: 88 phrases in 24 subjects |
Airports and air traffic control | 1 |
Astronautics | 2 |
Business | 1 |
Construction | 9 |
Electronics | 1 |
Energy industry | 4 |
Firefighting and fire-control systems | 4 |
Geology | 2 |
Heating | 1 |
Mass media | 1 |
Mathematics | 1 |
Medical appliances | 2 |
Military | 1 |
Mining | 4 |
Molikpaq | 12 |
Nanotechnology | 1 |
Oil / petroleum | 1 |
Polymers | 1 |
Refrigeration | 19 |
Technology | 12 |
Textile industry | 2 |
Thermal engineering | 1 |
Torpedoes | 1 |
Ventilation | 4 |