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| optical technique | |||
| optical team | |||
| оптический метод исследования: 29 phrases in 12 subjects |
| Aerohydrodynamics | 3 |
| Automobiles | 2 |
| Construction | 3 |
| Electronics | 1 |
| Geophysics | 2 |
| Makarov | 9 |
| Mechanic engineering | 1 |
| Mining | 1 |
| Nautical | 2 |
| Polymers | 1 |
| Seismology | 2 |
| Technology | 2 |