LED tri-vision display 1.Full set digital control equipment 2.CE,ISO9000 ... equipment2.Maintenance free3.CE,ISO9000,National Invention PatentLED tri-vision display , tri-vision display,trivision billboardThe specification:External frame: 136-145mm,thickness ... : 26kg/square meterDriving: double-gear steps driving system Honghai Tri-vision display peculiar techinique advantages:A Hong Hai has almost all ...