The power generation process 4 wherein {TAIL ~ the stream} of steam is passed through {HEAD ~ a body} of oil 
The power generation process 4 wherein { TAIL ~ the stream } of steam is passed through { HEAD ~ a body } of oil
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH