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circuit tuning : 25 phrases in 9 subjects |
| Antennas and waveguides | 1 |
| Aviation | 1 |
| Electronics | 3 |
| Geology | 1 |
| Makarov | 9 |
| Mass media | 2 |
| Physics | 1 |
| Technology | 4 |
| Telecommunications | 3 |
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