短語(yǔ)詞組短語(yǔ)fire prevention covering 阻火罩fire resisting covering 防火涂層厚度fire -retardant roof covering 阻燃屋面覆蓋層fire control bolt covering 消防栓蓋minimum fire -protection covering 最小防火保護(hù)層covering fire 掩護(hù)火力;掩護(hù)射擊;火力掩護(hù);援護(hù)射擊give covering fire 火力支援covering fire detail 掩護(hù)火力 返回 fire cover