Inzira zicyuma zikozwe mubikoresho byuma, mubisanzwe bigizwe nibyuma byumunyururu. Bikunze gukoreshwa mumashini aremereye nka moteri, buldozeri, crusher, imashini icukura, imizigo na tank. Ugereranije na rubber tracks, ibyuma bifite s ikomeye ...
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