Malingana ndi njira yogwiritsira ntchito, pali njira zisanu ndi imodzi zopangira asidi pickling ndi passivation ya chitsulo chosapanga dzimbiri: njira yomiza, njira ya phala, njira yopopera, kupopera mbewu mankhwalawa, njira yozungulira, ndi electrochemical njira.Mwa izi, njira yomiza, phala ...
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