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