The device includes {HEAD ~ a chamber} having a heating element, an inlet, and {TAIL ~ a constricted egress channel} 
having
The device includes { HEAD ~ a chamber } having a heating element , an inlet , and { TAIL ~ a constricted egress channel }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL