Depending on the energy absorption requirements of the specific application, {HEAD ~ the depth} of the channel may be up to {TAIL ~ the depth} of the recess 
Depending on the energy absorption requirements of the specific application , { HEAD ~ the depth } of the channel may be up to { TAIL ~ the depth } of the recess
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH