... over lifting,high lifting ,vertical lifting.3.Safty device:*End air sac protection device (door panel would stop closing and runs ... pass by under the door)*Cable break device (if cable break accidently, the device would lock the track and stop the ... ,strong shock resistance PC slat,high-speed running operator/motor,safety protection device,etc. ( function(){ var aBigImageSrc = [ 'http://i01.i.aliimg. ...