Added to the first mixture is 1.3% to 1.7% by {HEAD ~ weight} of {TAIL ~ a second mixture} of substantially 80% Al2 O3 fiber and 20% SiO2 particles, all on a weight basis 
of
Added to the first mixture is 1.3 % to 1.7 % by { HEAD ~ weight } of { TAIL ~ a second mixture } of substantially 80 % Al2 O3 fiber and 20 % SiO2 particles , all on a weight basis
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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