{HEAD ~ An airflow propulsion device} is coupled to {TAIL ~ the intake opening} to draw the flow through the intake opening and through a flow passage having an approximately constant flow area 
is coupled to
{ HEAD ~ An airflow propulsion device } is coupled to { TAIL ~ the intake opening } to draw the flow through the intake opening and through a flow passage having an approximately constant flow area
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH