短語詞組短語fire prevention covering 阻火罩fire resisting covering 防火塗層厚度fire -retardant roof covering 阻燃屋麪覆蓋層fire control bolt covering 消防栓蓋minimum fire -protection covering 最小防火保護層covering fire 掩護火力;掩護射擊;火力掩護;援護射擊give covering fire 火力支援covering fire detail 掩護火力 返回 fire cover