防空
air defence;anti-aircraft
～部隊air defence forces/～導彈air defence missile;interceptor missile/～壕（洞）air-raid dugout (or shelter);hideout for evildoers/～警報air alert;air-raid warning/～識別區(qū) air defense identification zone/～演習air defense exercise (or practice);air-raid drill/～掩體air raid shelter