{HEAD ~ The equipment} used for processing {TAIL ~ parcels} is more varied but requires that the piece be separated prior to the sortation process 
{ HEAD ~ The equipment } used for processing { TAIL ~ parcels } is more varied but requires that the piece be separated prior to the sortation process
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH