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non-directional beacon
gen.	全向无指向性无线电信标
avia.	无方向性信标
space	全向信标
tech.	非定向标灯
non directional radio beacon
el.	无指向性无线电信标; 全向无线电信标
non directional beacon
busin.	非定向信标
English thesaurus
non-directional beacon
avia., Canada	An LF/MF or UHF radio beacon transmitting non-directional signals whereby the pilot of an aircraft equipped with direction-finding equipment can determine his or her bearing to or from the radio beacon and "home" on or track to or from the station. When the radio beacon is installed in conjunction with the instrument landing system ILS marker, it is normally called a marker beacon.
Non-Directional Beacon
abbr., scottish	NDB

non-directional beacons: 12 phrases in 4 subjects

Aviation	3
Navigation	1
Oil / petroleum	1
Technology	7