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| frequency adjustment | |||
| frequency control | |||
| frequency modulation; frequency regulation | |||
| 频率调节: 16 phrases in 9 subjects |
| Agriculture | 1 |
| Electric machinery | 1 |
| Electronics | 3 |
| General | 1 |
| Metallurgy | 3 |
| Nuclear and fusion power | 1 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Technology | 4 |
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