{HEAD ~ The system} also keeps to {TAIL ~ a minimum} the costs of disposal of the absorbent material after it has served its function 
keeps to
{ HEAD ~ The system } also keeps to { TAIL ~ a minimum } the costs of disposal of the absorbent material after it has served its function
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH