... 2.CE,ISO9000,National Invention Patent Mosaic fixed trivision display 1.Full set digital control equipment2.Maintenance free3. ... CE,ISO9000,National Invention Patent Mosaic fixed trivision display ,tri-vision display,trivision billboard, trivision board The specification: External ... : double-gear steps driving system Honghai Tri-vision display peculiar techinique advantages: A Hong Hai has almost ...