{HEAD ~ The short fibers} may be made of a single crystal such as whisker or of {TAIL ~ a polycrystal} 
made of
{ HEAD ~ The short fibers } may be made of a single crystal such as whisker or of { TAIL ~ a polycrystal }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL