critical velocity : 30 phrases in 15 subjects |
Aerodynamics | 1 |
Agriculture | 1 |
Astronautics | 6 |
Bridge construction | 1 |
Construction | 4 |
Ecology | 1 |
Geography | 1 |
Hydraulic engineering | 2 |
Hydrology | 4 |
Makarov | 1 |
Meteorology | 2 |
Nanotechnology | 1 |
Physics | 2 |
Road works | 1 |
Water resources | 2 |