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