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| radiofrequency amplifier | |||
| radio-frequency amplifier | |||
| radio frequency amplifier | |||
| radio-frequency transmitter | |||
| 射频放 大 器: 25 phrases in 9 subjects |
| Air defense | 3 |
| Aviation | 2 |
| Communications | 1 |
| Electronics | 5 |
| General | 4 |
| Physics | 1 |
| Space | 4 |
| Technology | 4 |
| Telecommunications | 1 |
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