navigational aid

短语词组

短語

• navigational visual aid 目眡助航設施
• navigational lighting aid 助航燈光
• shipborne navigational aid 船載導航設備
• NAVAID Navigational Aid 導航設施
• Air navigational aid 助航設施
• nab navigational aid to bombing 轟炸導航設備
• AIRNAVAI D Air Navigational Aid 導航輔助設備
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