{HEAD ~ Underpressure} arises due to {TAIL ~ condensation} of the steam from the steam gas mixture, leaving dryer 15, in condenser 16 and gas evacuation of non condensing gases by vacuum pump 17 
arises due to
{ HEAD ~ Underpressure } arises due to { TAIL ~ condensation } of the steam from the steam gas mixture , leaving dryer 15 , in condenser 16 and gas evacuation of non condensing gases by vacuum pump 17
HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH