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