Volume curtain panels, English, Rails, electric drive components. Curtain panels are 1.5 thick cold rolled steel strip rolled into "c" plate overlap interlock, with good rigidity, excellent sealing performance characteristics. Can be used for steel "r-series portfolio structure. Served with warm sense of alarm systems, smoke, light, water curtain spray system in the event of an automatic fire alarm, sprinkler, door control down, fixed delay off, enable affected people to evacuate. Fire prevention system-wide comprehensive performance significantly