4130 ibikoresho nibikoresho byujuje ubuziranenge byibyuma bifite imbaraga zidasanzwe kandi birwanya ubushyuhe, bikoreshwa cyane mubyogajuru, kubaka ubwato, gukora amamodoka nizindi nzego. Ibigize imiti ikubiyemo ibintu nka chromium, molybdenum, na fer, hamwe nigipimo cyiza cya ...
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