{TAIL ~ The secondary ingredients} comprise {HEAD ~ 0.02 0.10 wt % part SiO2} and 0.01 0.03 wt part Al2 O3 with respect to 100 wt parts of the primary ingredients, with the weight ratio of SiO2 to Al2 O3 being from 1.5 to 5.0 
{ TAIL ~ The secondary ingredients } comprise { HEAD ~ 0.02 0.10 wt % part SiO2 } and 0.01 0.03 wt part Al2 O3 with respect to 100 wt parts of the primary ingredients , with the weight ratio of SiO2 to Al2 O3 being from 1.5 to 5.0
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH