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