 |
| |||
| frequency composition | |||
| frequency synthesizing | |||
| frequency synthesis | |||
| 频率 合成: 33 phrases in 8 subjects |
| Air defense | 8 |
| Aviation | 2 |
| Electronics | 10 |
| General | 1 |
| Information technology | 4 |
| Space | 4 |
| Technology | 3 |
| Telecommunications | 1 |
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