navigational aid

短语词组

短语

• navigational visual aid 目视助航设施
• navigational lighting aid 助航灯光
• shipborne navigational aid 船载导航设备
• NAVAID Navigational Aid 导航设施
• Air navigational aid 助航设施
• nab navigational aid to bombing 轰炸导航设备
• AIRNAVAI D Air Navigational Aid 导航辅助设备
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