Mubitekerezo byacu, inkono zicyuma zisa nkiziremereye, ariko ziraramba, ubushyuhe buringaniye, kandi nibyiza kubuzima bwabantu.Kandi hari inyungu nyinshi zo gukoresha inkono y'icyuma, nko gukoresha inkono y'icyuma kugirango ugabanye amavuta yakoreshejwe muguteka, kwirinda ingaruka zishobora guterwa na chemica yangiza ...
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