短語詞組短語navigational visual aid 目眡助航設(shè)施navigational lighting aid 助航燈光shipborne navigational aid 船載導航設(shè)備NAVAID Navigational Aid 導航設(shè)施Air navigational aid 助航設(shè)施nab navigational aid to bombing 轟炸導航設(shè)備AIRNAVAI D Air Navigational Aid 導航輔助設(shè)備 返回 navigational aid