Hluav taws xob arc furnaces, high-power dov mills, hoists, hluav taws xob locomotives, cua ua liaj ua teb thiab lwm yam loads yuav muaj ib tug series ntawm tsis zoo tshwm sim nyob rau hauv daim phiaj thaum lawv txuas nrog rau kab sib chaws vim lawv tsis-linearity thiab cuam tshuam.