| 释义 |
non-directional radio beacon全方位无线电导航台non-directional radio beacon非定向无线电信标non-directional radio beacon全向无线电信标non-directional radio beacon全向無線電信標電機工程non-directional radio beacon (NDB)全方位無線電導航台航空太空名詞non-directional radio beacon非定向無線電信標通訊工程non-directional rad |