Lekholong la bo21 la lilemo, ka tsoelo-pele ea saense le thekenoloji, tlhahisoleseding, matla, thepa, boenjiniere ba likokoana-hloko e se e le litšiea tse 'nè tsa tsoelo-pele ea tlhahiso ea sechaba ea kajeno, silicon carbide ka lebaka la thepa e tsitsitseng ea lik'hemik'hale, conductivity e phahameng ea mocheso, ex .. .
Bala haholoanyane