{HEAD ~ This toner mass information}, together with certain toner constants and known parameters, is used by {TAIL ~ the logic and control unit} to calculate the toners charge to mass ratio 
{ HEAD ~ This toner mass information } , together with certain toner constants and known parameters , is used by { TAIL ~ the logic and control unit } to calculate the toners charge to mass ratio
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH