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| 频率划分调制 | |||
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| 频率分割调制 | |||
| 频分调制 | |||
| 分频调制 | |||
| frequency-division-modulation: 9 phrases in 5 subjects |
| Air defense | 1 |
| Electronics | 5 |
| Oil / petroleum | 1 |
| Space | 1 |
| Telecommunications | 1 |
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