{HEAD ~ The YAG laser} is produced by {TAIL ~ exciting artificial crystal} comprising yttrium, aluminum and garnet to which an active ion Nd3+ contributing to laser oscillation is added 
is produced by
{ HEAD ~ The YAG laser } is produced by { TAIL ~ exciting artificial crystal } comprising yttrium , aluminum and garnet to which an active ion Nd3 + contributing to laser oscillation is added
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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