Advantage It is speciallv designedfor which have a prety wide opening width The door can be designed in curve t0 incease the integrate impression Technique Property Fire--resistance time:4 hours Heat radfancy:0.4w/cm3 Smoke proof:When pressurs dispersion is 20Pa,curtain smoke leakage less than 0.2m3/m2.min Anti-pressure:80Kg/m2 Open and close speed:2--9m/min Maximum opening width:single reel tupe is 15m,double reels type is 30m