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10
May
Uburyo bwo Kubungabunga Ibikoresho byo hanzeKoresha umwenda usukuye, woroshye kugirango uhanagure hejuru irangi buri gihe, kandi ntugashyire ibikoresho muri acide, imiti ya alkaline, namavuta.
Ibicuruzwa bizwi
Kohereza iperereza
