{HEAD ~ The size} and number of {TAIL ~ modules} in each set and the flow configuration is dependent upon the degrees of concentration achieved, the permeate fluxes attained through the membrane, and module cost 
of
{ HEAD ~ The size } and number of { TAIL ~ modules } in each set and the flow configuration is dependent upon the degrees of concentration achieved , the permeate fluxes attained through the membrane , and module cost
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH