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signal frequency range
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tech.
mid-range frequency signal
中频信号
tech.
signal frequency range
信号频率范围
avia.
very high frequency omnidirectional radio range test signal
甚高频全向无线电信标测试信号
(通过发射测试信号来检验 VOR 接收机的精度的地面设施。一些 VOT 在机载时也对用户有用,而另一些仅仅限于在地面使用)
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