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强制频率
avia.
mandatory frequency
(仅在某些时间内不受管制的选择的机场指定的频率。在指定的强制频率区运行的飞机上必须安装可保持双向通信的无线电通信设备,且必须在强制频率上监控并报告)
强制频率
强制振动频率
nautic., tech.
forced frequency
强制频 率
:
1 phrase
in 1 subject
Technology
1
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