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optical instruments : 36 phrases in 18 subjects |
| Astronautics | 5 |
| Cartography | 1 |
| Construction | 1 |
| Electronics | 2 |
| General | 2 |
| Geophysics | 1 |
| Gyroscopes | 1 |
| Household appliances | 1 |
| Informal | 1 |
| Makarov | 4 |
| Meteorology | 1 |
| Metrology | 1 |
| Military | 2 |
| Nanotechnology | 1 |
| Nautical | 1 |
| Optics branch of physics | 2 |
| Technology | 8 |
| Trade classification | 1 |