According to a potentially preferred practice, {HEAD ~ heating} is carried out at a temperature of about 195 325° F. and {TAIL ~ a pressure} of about 15 400 psi 
According to a potentially preferred practice , { HEAD ~ heating } is carried out at a temperature of about 195 325 ° F. and { TAIL ~ a pressure } of about 15 400 psi
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH