{TAIL ~ The coated fibrous carbon material} is then reimpregnated with a second thermosetting resin containing a boron compound and, optionally, a refractory metal capable of reacting with {HEAD ~ boron} to form a metal boride 
{ TAIL ~ The coated fibrous carbon material } is then reimpregnated with a second thermosetting resin containing a boron compound and , optionally , a refractory metal capable of reacting with { HEAD ~ boron } to form a metal boride
TAIL TAIL 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 OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH