ʻO ka maʻamau, he kiʻekiʻe ka nui o ke kalapona o ka coke petroleum calcined mai 98% a 99.5%. ʻO kēia ʻike kalapona kiʻekiʻe e hōʻoia i ka hana maikaʻi loa i nā noi e pili ana i ke kalapona, e like me ka hana anode a me ka hana kila.
