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