 |
| critical flow: 33 phrases in 15 subjects |
| Aerodynamics | 4 |
| Aeronautics | 1 |
| Automated equipment | 1 |
| Aviation | 3 |
| Combustion gas turbines | 1 |
| Construction | 3 |
| Ecology | 1 |
| Electronics | 6 |
| Energy industry | 4 |
| General | 1 |
| Geography | 1 |
| Makarov | 2 |
| Oil / petroleum | 1 |
| Oil and gas technology | 1 |
| Technology | 3 |