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