Ifu y'ivu ry'umukungugu wo mu mazi yo gusukamo/gutera sima/gushyiramo amavuta
Ifu y'ivu ry'umukungugu wo mu mazi yo gucukura/gutunganya/gusiga sima ku iriba ry'amavuta Ibisobanuro by'ibicuruzwa: Ifu y'ivu, rimwe na rimwe yitwa mikorosife, ni uruziga rworoshye, rudafite ikintu, rufite ubugari rukozwe ahanini muri silica na alumina kandi rwuzuyemo umwuka cyangwa gaze idakoresha ikintu, akenshi rutanga...
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