略語大辞典 [MIL] 22 IFFN interrogate friend/foe/neutral (waveform) 味方・敵・第三者の問審(波形). 戦術戦闘機の通信機能.interrogate friend/foe/neutral (waveform); a communication function for a tactical fighter; [MIL:C:E]. 丸善「略語大辞典」JLogosID : 11878174