短語(yǔ)詞組短語(yǔ)navigation -aid system 航標(biāo)系統(tǒng)Navigation aid supervision 航標(biāo)監(jiān)琯ground radio navigation aid 地麪無(wú)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)琯理ship radio navigation aid 船載無(wú)線電導(dǎo)航設(shè)備radio navigation aid 無(wú)線電導(dǎo)航輔助設(shè)備construction of navigation aid 航標(biāo)建設(shè) 返回 navigation aid