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| 检波器信号 | |||
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detector signal : 23 phrases in 10 subjects |
| Air defense | 4 |
| Aviation | 1 |
| Communications | 1 |
| Electronics | 4 |
| General | 1 |
| Geophysics | 1 |
| Information technology | 2 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 6 |
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