{HEAD ~ An electrical bias} is applied across {TAIL ~ the gap} between the belt and the overcoated ohmic layer 
{ HEAD ~ An electrical bias } is applied across { TAIL ~ the gap } between the belt and the overcoated ohmic layer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH