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| 频率传感器 | |||
| frequency transmitter: 32 phrases in 8 subjects |
| Air defense | 4 |
| Automobiles | 1 |
| Aviation | 2 |
| Communications | 1 |
| Electronics | 7 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 14 |
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