Abin da ake kira jure wa ƙarfin lantarki, gwargwadon aikinsa, ana iya kiransa mai gwada ƙarfin insulation na lantarki, gwajin ƙarfin wutar lantarki, da dai sauransu. Ka'idar aikinsa ita ce: yi amfani da ƙarfin lantarki sama da na yau da kullun na aiki zuwa insulator na kayan aikin da aka gwada don takamaiman lokacin...
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