... choice,SNMA or SEW.3.Door construction --Doorframe use cold-roll steel sheets of Shanghai Baosteel,2mm thickness,paint under conditions ... ,industry,carwash,pharmaceutics&chemistry,healthcare,automotive,food industry, distribution, logistics, cold stores & refrigerators6.Technical parameter --Opening & closing speed: 0.7 ... . Thirdly,our door aslo install emergency stop equipment fast roll up pvc door