axe principal : 39 phrases in 15 subjects |
Armored vehicles | 1 |
Aviation | 4 |
Construction | 4 |
Geology | 1 |
Mathematics | 3 |
Mechanic engineering | 5 |
Medical | 1 |
Metallurgy | 2 |
Meteorology | 1 |
Military | 2 |
Physics | 1 |
Politics | 2 |
Radio | 1 |
Surveying | 5 |
Technology | 6 |