The device 4, wherein the path in {TAIL ~ the shell} is created in response to the shape memory material attaining {HEAD ~ a predetermined temperature} 
The device 4 , wherein the path in { TAIL ~ the shell } is created in response to the shape memory material attaining { HEAD ~ a predetermined temperature }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD