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| 环形天线; 天线电路 | |||
| antenna loop: 41 phrases in 10 subjects |
| Air defense | 5 |
| Aviation | 2 |
| Electronics | 3 |
| General | 2 |
| Information technology | 1 |
| Radio | 1 |
| Shipbuilding | 2 |
| Space | 10 |
| Technology | 13 |
| Telecommunications | 2 |
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