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| momentum range | |||
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信号间隔 : 20 phrases in 10 subjects |
| Agriculture | 1 |
| Air defense | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Multimedia | 1 |
| Oil / petroleum | 1 |
| Power system protection | 6 |
| Space | 2 |
| Technology | 4 |
| Telecommunications | 2 |
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