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| 调频-调相 | |||
| 调频一调相 | |||
| 调频调相 | |||
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| 调频/调相 | |||
| 调频与调相 | |||
| frequency modulation-phase modulation: 8 phrases in 5 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Electronics | 3 |
| Geophysics | 2 |
| Oil / petroleum | 1 |
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