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