radio aid

基本解釋

Radar apparatus, radio navigational aid apparatus and radio remote control apparatus.
雷達(dá)設(shè)備、無線電導(dǎo)航設(shè)備及無線電遙控設(shè)備。
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Broadcasters said villagers on Alishan had crawled down the mountainside to an abandoned police station to request aid by radio.
電視主播說，阿里山上的村民攀爬下山來到一個(gè)廢棄的警察局通過無線電請(qǐng)求援助。
A radio navigational aid for determining the distance from a selected DME ground station by measuring the time of transmission to and from it.
飛機(jī)上的一種無線電導(dǎo)航設(shè)備，通過測(cè)量電波往返飛機(jī)和預(yù)選地面（DME）臺(tái)之間所需要的時(shí)間來確定兩者間的距離。