исследование верхних слоев атмосферы: 51 phrases in 12 subjects |
Aerohydrodynamics | 5 |
Artillery | 3 |
Astronautics | 18 |
Ecology | 2 |
Electronics | 1 |
Meteorology | 2 |
Military | 5 |
Missiles | 3 |
Nanotechnology | 2 |
Navigation | 1 |
Technology | 8 |
Weapons and gunsmithing | 1 |