| 单词 | radio marker beacon station |
| 释义 | radio marker beacon station [`rād·ē·ō `mär·kǝr ´bē·kǝn ´stā·shǝn] NAVIGATION Station marking a definite location on the ground as an aid to aircraft at altitude; the International Civil Aviation Organization beacons operate at a single frequency of 75 megahertz. |
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