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система опознавания "свой-чужой" stresses
avia.	identification friend/foe; friend-or-foe identification; identification friend or foe system
mil.	identification friend or foe (Киселев); BFT/RFM (qwarty); IFF system (сокр. от "identification-friend or foe system" Alex_Odeychuk)
система опознавания свой-чужой
mil.	Identification "friend or foe" (IFF)
NATO	Identification friend or foe
система опознавания "свой – чужой"
mil.	identification friend-or-foe system (Киселев); IFF (WiseSnake)

система опознавания "свой-чужой: 69 phrases in 6 subjects

Astronautics	3
Aviation	2
Military	55
Nanotechnology	1
Radiolocation	1
Technology	7