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Gukoresha ibyuma bya 40Cr, ukurikije byimazeyo ibisabwa, inzira yabanje gutunganywa neza, kuzimya no kugabanya ubushyuhe HRC30-35, kurangiza kimwe no kurangiza, hanyuma amaherezo ugasya kugirango ubuziranenge bwibicuruzwa bumeze neza, bikurikije neza; hamwe no kwihanganira gutahura.

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