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| 电气信号: 23 phrases in 11 subjects |
| Air defense | 1 |
| Architecture | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Cables and cable production | 1 |
| Communications | 1 |
| Electronics | 1 |
| General | 2 |
| Nautical | 1 |
| Steel production | 1 |
| Technology | 12 |
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