Kedu ihe ndị na-ekpo ọkụ na-ekpo ọkụ maka ọkụ ọkụ nnwale ọkụ dị elu?

Ihe ndị na-ekpo ọkụ nke ọkụ ọkụ nnwale ọkụ eletrik na-adịkarịkarị: waya mgbochi, mkpanaka silicon carbide, mkpanaka silicon molybdenum, graphite, molybdenum belt, wdg.