chloride attack and sulfate attack
Active Defensive System
active defensive technique
active security defensive
activities of defensive enzymes
activity of defensive enzymes
Air Raid Defensive Basement
Defensive
防御
防卫
防
防护
保护
卫气
防线
防御卫星
防守的
防御的
防御物
防卫的
防守性
具抗跌力
防御性
defensive and reduction of disasters
Defensive countermeasure
Defensive countermeasures
defensive efficiency rate