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