{TAIL ~ The amount} of the metal contained in the flexible thermosetting resin and the thermosetting resin containing {HEAD ~ the boron} is preferably present in excess of the amount stoichiometrically necessary to combine with the boron present 
{ TAIL ~ The amount } of the metal contained in the flexible thermosetting resin and the thermosetting resin containing { HEAD ~ the boron } is preferably present in excess of the amount stoichiometrically necessary to combine with the boron present
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH