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| locking circuit: 25 phrases in 10 subjects |
| Astronautics | 1 |
| Automobiles | 2 |
| Aviation | 2 |
| Electrical engineering | 1 |
| Electronics | 1 |
| Makarov | 1 |
| Nautical | 4 |
| Rail transport | 3 |
| Technology | 7 |
| Telecommunications | 3 |
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