d) available energy consuming means for transferring {HEAD ~ a fluid property} from {TAIL ~ said first fluid stream} to said second fluid stream; and 
from
d ) available energy consuming means for transferring { HEAD ~ a fluid property } from { TAIL ~ said first fluid stream } to said second fluid stream ; and
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH