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intermediate frequency amplification |
中频 放 大 : 42 phrases in 12 subjects |
Air defense | 9 |
Business | 2 |
Communications | 1 |
Earth sciences | 5 |
Electronics | 2 |
General | 4 |
Geophysics | 2 |
Information technology | 1 |
Radio | 1 |
Space | 6 |
Technology | 8 |
Telecommunications | 1 |