The melt and gaseous flow medium is passed through {HEAD ~ a Laval nozzle} at {TAIL ~ a supersonic speed} 
The melt and gaseous flow medium is passed through { HEAD ~ a Laval nozzle } at { TAIL ~ a supersonic speed }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL