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