Luftschichten : 50 phrases in 14 subjects |
Aerodynamics | 6 |
Artillery | 2 |
Aviation | 3 |
Building structures | 1 |
Construction | 1 |
Geology | 5 |
Geophysics | 2 |
Metrology | 12 |
Military | 3 |
Missiles | 5 |
Natural resourses and wildlife conservation | 2 |
Nuclear physics | 5 |
Oceanography & oceanology | 1 |
Paragliding | 2 |