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