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| 无线电仪器 | |||
| 无线电测量仪器 | |||
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| 无线电测量仪器 | |||
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radio instrument : 10 phrases in 5 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Electronics | 3 |
| Space | 2 |
| Technology | 3 |
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