covering for fire protection防火保护层
Covering g Fire掩护射击
give covering fire火力支援
covering fire detail掩护火力
fire covering掩护射击
fire prevention covering阻火罩
fire resisting covering防火涂层厚度
N（名词） firing intended to protect an individual or formation making a movement by forcing the enemy to take cover 掩护火力 [军事]