Chitsulo chodulira chaulere chimatanthawuza chitsulo cha alloy chomwe chimawonjezera kuchuluka kwa chinthu chimodzi kapena zingapo zaulere monga sulfure, phosphorous, lead, calcium, selenium, tellurium, etc.Ndi makina odzichitira okha, kuthamanga kwambiri komanso kulondola kwa kudula, ndikofunikira kwambiri kuti st ...
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