{HEAD ~ the amount} of {TAIL ~ fabric} per unit volume of elastomer is greater in said tooth bottoms than in said tooth portions 
of
{ HEAD ~ the amount } of { TAIL ~ fabric } per unit volume of elastomer is greater in said tooth bottoms than in said tooth portions
HEAD 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 OTH