{HEAD ~ an energy storing and absorbing material} in the chamber, said chamber and material decreasing in volume and having {TAIL ~ an equal hydrostatic force} in all directions upon direct impact with the projectile and returning to the original volume after impact 
{ HEAD ~ an energy storing and absorbing material } in the chamber , said chamber and material decreasing in volume and having { TAIL ~ an equal hydrostatic force } in all directions upon direct impact with the projectile and returning to the original volume after impact
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH