Once the predetermined temperature has been reached, the shape memory material recovers its shape and in the process applies a stress that results in {HEAD ~ the creation} of a path for the two substances to come in {TAIL ~ contact} 
Once the predetermined temperature has been reached , the shape memory material recovers its shape and in the process applies a stress that results in { HEAD ~ the creation } of a path for the two substances to come in { TAIL ~ contact }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL