The process pressure was also varied between {HEAD ~ a pressure} of 750 psi at the lower packing temperature to a pressure of 450 psi at the upper packing temperature of {TAIL ~ 450° F.}  
The process pressure was also varied between { HEAD ~ a pressure } of 750 psi at the lower packing temperature to a pressure of 450 psi at the upper packing temperature of { TAIL ~ 450 ° F. }
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 OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH