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| 呼叫〔识别〕信号 | |||
| 呼叫信号 | |||
| 呼叫识别信号 | |||
| 呼号; 识别信号 | |||
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call signal : 27 phrases in 8 subjects |
| Aviation | 1 |
| Computer networks | 2 |
| Electronics | 5 |
| Information technology | 5 |
| Multimedia | 1 |
| Rail transport | 1 |
| Technology | 8 |
| Telecommunications | 4 |
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