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