An electric field for {TAIL ~ development} is formed in a developing region between {HEAD ~ the photoconductive drum} and the sleeve 
An electric field for { TAIL ~ development } is formed in a developing region between { HEAD ~ the photoconductive drum } and the sleeve
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH