The splitting up of the remaining fraction high in plastics into {TAIL ~ the light fraction} and the heavy fraction may take place using {HEAD ~ air sizing} 
The splitting up of the remaining fraction high in plastics into { TAIL ~ the light fraction } and the heavy fraction may take place using { HEAD ~ air sizing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD