短語詞組短語radio approach aid 無線電進場輔助radio fixing aid [通信]無線電定位輔助設備radio audition aid system 無線助聽系統(tǒng)ground radio navigation aid 地麪無線電導航設備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radio hearing aid system 無線助聽系統(tǒng)radio homing aid [航]無線電歸航輔助設備radio landing aid 無線電著陸輔助設備 返回 radio aid