Intego yicyuma yerekeza kubintu bigenewe ibintu byihuta byingufu zitwara ibintu bigira ingaruka. Mubyongeyeho, mugusimbuza ibikoresho bitandukanye bigenewe (urugero, aluminium, umuringa, ibyuma bitagira umwanda, titanium, intego ya nikel, nibindi), sisitemu zitandukanye za firime (urugero, superhard, irwanya kwambara, anti-ruswa ...
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