The exhaust that is not extracted continues to power the main turbine system and flows from {TAIL ~ the low pressure end} to the turbine system to {HEAD ~ a waste heat boiler} 
The exhaust that is not extracted continues to power the main turbine system and flows from { TAIL ~ the low pressure end } to the turbine system to { HEAD ~ a waste heat boiler }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD