Thaum lub sijhawm ua haujlwm, qhov nruab nrab zaus qhov chaw vuam tshuab muaj cov khoom cua sov xws li vuam transformers, electrode caj npab, electrodes, conductive daim hlau, ignition kav, los yog siv lead ua valve hloov. Cov khoom no, uas tsim kom muaj cua sov, xav tau dej txias. Thaum tsim cov co...
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