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| emission frequency | |||
| transmission frequency | |||
| transmitting frequency | |||
| emissive frequency | |||
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发射频率 : 21 phrases in 9 subjects |
| Air defense | 3 |
| Automobiles | 1 |
| Communications | 1 |
| Electronics | 2 |
| Information technology | 1 |
| Metallurgy | 1 |
| Space | 3 |
| Technology | 7 |
| Telecommunications | 2 |
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