 |
| boundary equation: 38 phrases in 14 subjects |
| Aerohydrodynamics | 8 |
| Astronautics | 1 |
| Aviation | 2 |
| Combustion gas turbines | 1 |
| Electronics | 1 |
| Firefighting and fire-control systems | 1 |
| General | 1 |
| Geophysics | 1 |
| Hydrology | 2 |
| Makarov | 3 |
| Mathematics | 9 |
| Nanotechnology | 4 |
| Nautical | 1 |
| Technology | 3 |