LED tri-vision display 1.Full set digital control equipment 2.CE,ISO9000, ... CE,ISO9000,National Invention PatentLED tri-vision display , tri-vision display,trivision billboardThe specification:External frame: 136-145mm,thickness:1.8-2.0mmWidth ... of all manufacturers.B Honghai trivision display composes of divers of triangular prisms made by special aluminum alloy,Controlled by miccomputer, joined ...