A na-eme mmanụ ala nke eserese site na petroleum coke nke calcined. Isi usoro bụ graphitiztion na ọkụ graphitization. Coke mmanụ ala eserese bụ ezigbo ngwaahịa recarburizer nwere njirimara nitrogen dị ala.
Nkọwa ngwa ngwa:
