{TAIL ~ The wells} may vary in {HEAD ~ size} and depth depending upon the penetration of the laser beam into the panel of substrate material 18 
{ TAIL ~ The wells } may vary in { HEAD ~ size } and depth depending upon the penetration of the laser beam into the panel of substrate material 18
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH