Developer roller with semiconductive additive comprising {HEAD ~ a rubber body} containing soyadimethylethyl ammonium ethosulfate or {TAIL ~ trimethylammonium methylsulfate} 
Developer roller with semiconductive additive comprising { HEAD ~ a rubber body } containing soyadimethylethyl ammonium ethosulfate or { TAIL ~ trimethylammonium methylsulfate }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL