c) available energy consuming means for pre mixing {HEAD ~ a portion} of {TAIL ~ said first fluid stream} with another portion of said first fluid stream to form, within said conduit, a premixed first fluid stream generally separate from said second fluid stream 
of
c ) available energy consuming means for pre mixing { HEAD ~ a portion } of { TAIL ~ said first fluid stream } with another portion of said first fluid stream to form , within said conduit , a premixed first fluid stream generally separate from said second fluid stream
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL 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