{HEAD ~ The streams} can, more or less, contain equal parts of each component and are used without {TAIL ~ further processing} or purification 
are used without
{ HEAD ~ The streams } can , more or less , contain equal parts of each component and are used without { TAIL ~ further processing } or purification
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH