... decided by the stroboscope lamps 'quantity .The installing pedestals need to order dividually We have 2 units, 3 unit , 4 ... the strobe flashing frequency to same or approach as the speed of objects measured . This phenomenon of persistence of vision, people can ... printing industry, can be detected in the chromatography of high-speed printing process, ink color, cutting, punching, folding, etc.; for ...