A na-eji ihe ndị e ji emepụta ihe na-emepụta graphite eme ihe na-emepụta ihe na-eme ka ọ bụrụ ihe na-emepụta ihe maka transistor. Enwere ike iji ígwè nkedo, ụdị ọ bụla nke na-adịghị ferrous metal na-adịgide adịgide, nkedo ígwè, ịgbado ọkụ okporo ígwè thermite ịgbado ọkụ ebu, okpomọkụ na-eguzogide ígwè (titanium, zirconium, molybdenum).
GỤKWUO