Mbere ya byose, igishushanyo mbonera cyo kumenya no gukora ibishushanyo, icupa ry'ibirahure by'ibirahuri kugeza ku mucanga wa quartz nk'ibikoresho fatizo by'ibanze, bifatanije n'ibindi bikoresho mu bushyuhe bwo hejuru byashongeshejwe mu mazi, hanyuma ugashiramo amacupa meza y'amavuta, gukonjesha, gutemagura, ubushyuhe , ishingwa rya gl ...
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