 |
| refraction index: 47 phrases in 23 subjects |
| Antennas and waveguides | 5 |
| Astronomy | 1 |
| Astrophysics | 2 |
| Communications | 1 |
| Conventional notation | 1 |
| Electronics | 4 |
| General | 4 |
| Geology | 2 |
| Information technology | 1 |
| Mass media | 4 |
| Mathematics | 1 |
| Metrology | 1 |
| Military | 1 |
| Nautical | 1 |
| Navigation | 2 |
| Oil / petroleum | 2 |
| Optics branch of physics | 2 |
| Pharmacology | 1 |
| Physics | 3 |
| Polymers | 1 |
| Silicate industry | 1 |
| Technology | 5 |
| Textile industry | 1 |