 |
| converter tube: 39 phrases in 13 subjects |
| Antennas and waveguides | 1 |
| Astronautics | 2 |
| Automated equipment | 2 |
| Electronics | 4 |
| Household appliances | 1 |
| Information technology | 1 |
| Makarov | 2 |
| Mass media | 8 |
| Metrology | 5 |
| Military | 3 |
| Nanotechnology | 1 |
| Nuclear physics | 1 |
| Technology | 8 |