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| добавочная секция многократного поля (телефония) | |||
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switching section : 25 phrases in 11 subjects |
| Construction | 1 |
| Electrical engineering | 1 |
| Energy industry | 3 |
| Mathematics | 1 |
| Military | 1 |
| Molikpaq | 4 |
| Rail transport | 2 |
| Technology | 4 |
| Telecommunications | 6 |
| Tengiz | 1 |
| Thermal engineering | 1 |