Ọhụrụ ika Expandable Graphite EG-20

Dabere na ngwa ndị ọrụ njedebe, anyị na-emepụta otu graphite ọhụrụ EG-20, nke nwere oke mma yana ọnụego mgbasawanye 20.

Nnọọ na-akparịta ụka na ekele.