短語(yǔ)詞組短語(yǔ)radio approach aid 無(wú)線(xiàn)電進(jìn)場(chǎng)輔助radio fixing aid [通信]無(wú)線(xiàn)電定位輔助設(shè)備radio audition aid system 無(wú)線(xiàn)助聽(tīng)系統(tǒng)ground radio navigation aid 地面無(wú)線(xiàn)電導(dǎo)航設(shè)備ship radio navigation aid 船載無(wú)線(xiàn)電導(dǎo)航設(shè)備radio navigation aid 無(wú)線(xiàn)電導(dǎo)航輔助設(shè)備radio hearing aid system 無(wú)線(xiàn)助聽(tīng)系統(tǒng)radio homing aid [航]無(wú)線(xiàn)電歸航輔助設(shè)備radio landing aid 無(wú)線(xiàn)電著陸輔助設(shè)備 返回 radio aid