There can be several introduction gaps or orifices operating at {HEAD ~ one time} to increase {TAIL ~ the total production throughput} 
to increase
There can be several introduction gaps or orifices operating at { HEAD ~ one time } to increase { TAIL ~ the total production throughput }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL