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频段
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Chinese
English
主动式声呐频率分析和记录
系统
active sonar frequency analysis and recording
多普勒甚高频全向
无线电
测距
Doppler very-high frequency omnidirectional
radio
range
多普勒甚高频全向
无线电
测距
Doppler VOR
时/频避撞系统
time/frequency collision avoidance system
频率扫描雷达
frequency scanning radar
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