Rebar nizina risanzwe ryubushyuhe buzengurutse imbaho zicyuma.Urwego rwibisanzwe rushyushye ruzengurutse ibyuma bigizwe na HRB hamwe numusaruro muto wamanota.H, R, na B ninyuguti zambere zamagambo atatu, Hotroll, Ribbed, na Bars, kimwe....
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