短語詞組短語navigation -aid system 航標(biāo)系統(tǒng)Navigation aid supervision 航標(biāo)監(jiān)管ground radio navigation aid 地面無線電導(dǎo)航設(shè)備navigation aid facility 助航設(shè)施radar triangle navigation aid 雷達(dá)三角導(dǎo)航設(shè)備navigation aid administration 航標(biāo)管理ship radio navigation aid 船載無線電導(dǎo)航設(shè)備radio navigation aid 無線電導(dǎo)航輔助設(shè)備construction of navigation aid 航標(biāo)建設(shè) 返回 navigation aid