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pitch angle : 134 phrases in 32 subjects |
| Aerodynamics | 1 |
| Aerohydrodynamics | 3 |
| Aeronautics | 1 |
| Air defense | 3 |
| Antennas and waveguides | 1 |
| Astronautics | 7 |
| Automated equipment | 5 |
| Automobiles | 1 |
| Aviation | 26 |
| Cartography | 1 |
| Construction | 2 |
| Drilling | 3 |
| Gear train | 3 |
| General | 1 |
| Geology | 1 |
| Helicopters | 1 |
| Jet engines | 2 |
| Leather | 1 |
| Makarov | 7 |
| Mechanics | 2 |
| Military | 3 |
| Mining | 3 |
| Nautical | 16 |
| Navigation | 1 |
| Oil / petroleum | 2 |
| Oil and gas technology | 1 |
| Oilfields | 2 |
| Physics | 4 |
| Shipbuilding | 2 |
| Space | 12 |
| Technology | 15 |
| Transport | 1 |