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| frequency division multiplex; frequency division multiplexing | |||
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分频多路传 输 : 15 phrases in 7 subjects |
| Air defense | 3 |
| Electronics | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Space | 4 |
| Technology | 2 |
| Telecommunications | 2 |
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