1, Kubungabunga amavuta Mbere yo gukoresha buri gihe kinini cyo guca nyakatsi, genzura urwego rwamavuta kugirango urebe niba ari hagati yubunini bwo hejuru nubunini bwikigereranyo cya peteroli. Imashini nshya igomba gusimburwa nyuma yamasaha 5 yo gukoresha, kandi amavuta agomba kongera gusimburwa nyuma yamasaha 10 yo gukoresha, na ...
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