ＥＣＭalso: イーシーエムFreq.FrequencyTop 100,000Meanings1nounelectronic countermeasures; ECMmilitaryMilitary term for electronic systems used to disrupt enemy radar, communications, or other electronic equipment.敵てきのレーダーを妨ぼう害がいするためにＥＣＭが使し用ようされた。ECM was used to jam the enemy's radar.
