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control amplifier : 34 phrases in 14 subjects |
| Astronautics | 1 |
| Automated equipment | 4 |
| Automobiles | 1 |
| Aviation | 1 |
| Electrical engineering | 3 |
| Electrochemistry | 1 |
| Electronics | 3 |
| Makarov | 2 |
| Mass media | 1 |
| Military | 3 |
| Nanotechnology | 2 |
| Technology | 8 |
| Telecommunications | 3 |
| Television | 1 |