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unidentified object

stresses
astronaut. неопознанный объект
sec.sys. неотождествлённый объект
 English thesaurus
Unidentified Object
mil., abbr. UO
unidentified object
: 17 phrases in 9 subjects
Astronomy2
Diplomacy1
Electronics1
General7
Geophysics1
Medical1
Military1
Nanotechnology2
Radioengineering1