{HEAD ~ The optical inspection} of each component instantaneously occurs by recording the eight optical images, on two frames, one frame being recorded by each of {TAIL ~ the cameras} 
{ HEAD ~ The optical inspection } of each component instantaneously occurs by recording the eight optical images , on two frames , one frame being recorded by each of { TAIL ~ the cameras }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL