Cholinga: Graphite petroleum coke GPC imapangidwa ndi petroleum coke yapamwamba kwambiri. Ndi mtundu wamtundu wapamwamba kwambiri wa carburizing, wokhala ndi mpweya wokhazikika, sulfure wotsika, phulusa lotsika, kuchuluka kwa mayamwidwe ndi zabwino zina. Angagwiritsidwe ntchito kupanga apamwamba zitsulo, chitsulo choponyedwa ndi aloyi.
