Sisitemu Ibiranga
1.Uburozi burebwa neza kandi bugengwa kugirango bumve.
2.Ibike byamavuta ya peteroli uhereye kuri orficices ntabwo bigengwa nubushyuhe bwa peteroli, ubushyuhe nubushishozi bwa peteroli.
3.Ibipimo byamavuta yamavuta yububiko bwibisobanuro hamwe nibisobanuro bimwe ntabwo bigomba kwishyiriraho nuburebure.
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