{HEAD ~ threshold} determining {TAIL ~ means} for determining a velocity threshold value functionally related to said crash displacement value; and 
determining
{ HEAD ~ threshold } determining { TAIL ~ means } for determining a velocity threshold value functionally related to said crash displacement value ; and
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH