Mu modoka nyinshi zo murugo zisohoka hakiri kare, urumuri rwagati rwagati hamwe na rheostat rwakoreshejwe cyane, bikwemerera guhindura urumuri rwibikoresho byinyuma.Soma ibyerekeye ibyo bikoresho, ubwoko bwabyo, igishushanyo, imikorere, ...
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