The devices additionally contain a surfactant erosion rate modifier that cooperates with and interacts with polymers for regulating the rate of {HEAD ~ erosion} of {TAIL ~ the polymers} 
of
The devices additionally contain a surfactant erosion rate modifier that cooperates with and interacts with polymers for regulating the rate of { HEAD ~ erosion } of { TAIL ~ the polymers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL