... SEW.3.Door construction --Doorframe use cold-roll steel sheets of Shanghai Baosteel,2mm thickness,paint ... wayRadar/earth induction/remote control/pulling rope/manual.5.Applicable areasairport,industry,carwash,pharmaceutics&chemistry,healthcare,automotive ... or car touch the falling door,it bound up automatically. Secondly,at the bottom of our ... aslo install emergency stop equipment fast roll up pvc door