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| 选择呼叫; 选呼; 选择呼叫〔系统〕 (system) | |||
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| 选呼 | |||
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| 选择呼叫系统 | |||
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selective calling : 24 phrases in 6 subjects |
| Aviation | 3 |
| Communications | 11 |
| Electronics | 2 |
| Rail transport | 1 |
| Technology | 2 |
| Telecommunications | 5 |
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