9 [ measuring instruments for scientific purposes, namely, scales or meters for measuring weight, electric current, electrical voltage, volume, temperature, humidity, pressure, cycle, radioactivity, power, light intensity, speed, density and concentration; optical signaling devices and instruments, namely, illuminated signs, information displays, advertising displays and display boards with digital text display, graphics diode display, digital text or graphics diode display screen, planes of projection, luminous moving lettering text and luminous flow diagrams, luminous signs, electric luminescent display panels, light emitting diodes, light emitting diode displays; electromechanical and electronic products used in advertising, namely, illuminated signs, information displays, advertising displays and display boards with digital text display, graphics diode display, digital text or graphics diode display screen, planes of projection, luminous moving lettering text and luminous flow diagrams; luminous signs; electric luminescent display panels; light emitting diodes; light emitting diode displays ] * electromechanical and electronic products used in advertising, namely luminous moving screens, luminous flow diagrams and light emitting diode displays in the form of display balls performing moving screen *