The pre mixing and impingement improves {HEAD ~ the heat transfer process} within {TAIL ~ the prior art device} 
The pre mixing and impingement improves { HEAD ~ the heat transfer process } within { TAIL ~ the prior art device }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL