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| 调谐; 频率调节; 调频 | |||
| 频率调整 | |||
| frequency adjustment: 10 phrases in 7 subjects |
| Air defense | 1 |
| Electric machinery | 2 |
| Metallurgy | 1 |
| Piezoelectric crystals | 2 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 1 |
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