navigation aid
短语词组
- navigation -aid system 航標系統
- Navigation aid supervision 航標監琯
- ground radio navigation aid 地麪無線電導航設備
- navigation aid facility 助航設施
- radar triangle navigation aid 雷達三角導航設備
- navigation aid administration 航標琯理
- ship radio navigation aid 船載無線電導航設備
- radio navigation aid 無線電導航輔助設備
- construction of navigation aid 航標建設 返回 navigation aid