{HEAD ~ The YAG laser} is for {TAIL ~ fine working}, and therefore is suitable for use in the present invention 
is for
{ HEAD ~ The YAG laser } is for { TAIL ~ fine working } , and therefore is suitable for use in the present invention
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH