 |
| perturbation theory: 85 phrases in 15 subjects |
| Aerohydrodynamics | 2 |
| Astronautics | 1 |
| Astronomy | 1 |
| Automated equipment | 1 |
| Aviation | 2 |
| Chemistry | 2 |
| Electronics | 3 |
| General | 16 |
| Gyroscopes | 1 |
| High energy physics | 1 |
| Makarov | 38 |
| Nautical | 1 |
| Physics | 13 |
| Quantum mechanics | 2 |
| Semiconductors | 1 |