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| optisches Verfahren | |||
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| im Optischen | |||
| оптический метод: 39 phrases in 18 subjects |
| Aerodynamics | 3 |
| Aviation | 5 |
| Chemistry | 2 |
| Cinema equipment | 1 |
| Computers | 1 |
| Construction | 4 |
| Electronics | 3 |
| General | 1 |
| Hydrology | 1 |
| Mechanics | 1 |
| Military | 2 |
| Missiles | 3 |
| Optics branch of physics | 5 |
| Quantum electronics | 1 |
| Silicate industry | 2 |
| Technology | 2 |
| Textile industry | 1 |
| Water supply | 1 |