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| 视觉听觉测距甚高频无线堪设备有¥学和音响显示的无线电信标 | |||
| 视距; 听觉范围 | |||
| 视听航向信标 | |||
| 可见可听范围; 声影显示范围; 能见到听到的范围 | |||
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| 视听式无线电信标 | |||
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| 视听式无线电航向信标 | |||
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| 视听甚高频无线电信标 | |||
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visual-aural range : 4 phrases in 3 subjects |
| Aviation | 2 |
| Electronics | 1 |
| Technology | 1 |
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