Supplementary to Audible Alarms: VADs are specially efficient in substantial-noise places or where by hearing defense is worn, supplementing common audible alarms. タイムゲートを通じて第二次世界大戦時に派遣された自衛隊が、満州国に襲来するソ連赤軍の航空機を迎撃するために使用する。 The Office environment of Undergraduate Investigation is obtainable to meet with learners independently to... https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/