FIG 4 shows {HEAD ~ a hook type release shape memory material release mechanism} provided on {TAIL ~ a leaf spring} 
provided on
FIG 4 shows { HEAD ~ a hook type release shape memory material release mechanism } provided on { TAIL ~ a leaf spring }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL