Each individual scanning entity has {HEAD ~ an error corrector} for correcting {TAIL ~ erroneous scanned bar code information} using the locally stored printhead defect models 
for correcting
Each individual scanning entity has { HEAD ~ an error corrector } for correcting { TAIL ~ erroneous scanned bar code information } using the locally stored printhead defect models
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH