drift correction : 31 phrases in 15 subjects |
Artillery | 4 |
Astronautics | 1 |
Aviation | 1 |
Geophysics | 4 |
Gyroscopes | 1 |
Laboratory equipment | 1 |
Makarov | 1 |
Meteorology | 2 |
Military | 2 |
Nanotechnology | 1 |
Nautical | 4 |
Navigation | 1 |
Seismology | 1 |
Sports | 1 |
Technology | 6 |