PCR (Primary charge roller) bụ ụzọ ọhụrụ e si achaji ihe nke ọma na gburugburu ebe obibi. Usoro a na-ebelata mmepụta ozone ma na-achaji ya nke ọma na-enweghị mkpọtụ. A na-ejikarị ya eme ihe n'ọtụtụ ebe na igwe nbipute laser yana na igwe nbipute ndị na-anaghị agba ọsọ.
