Site na njirimara nke iguzogide okpomọkụ dị elu, iguzogide nchara, iguzogide abrasion na mkpuchi, seramiiki nwere ike ịrụ ọrụ n'ọtụtụ ụdị ngwa mmepụta semiconductor nwere ọnọdụ okpomọkụ dị elu, ikuku ma ọ bụ gas na-emebi emebi ruo ogologo oge.