M'machitidwe, pali zida zotsimikiziridwa zosiyanasiyana zopangira mipiringidzo yowombera. Izi zikuphatikiza zitsulo za manganese, zitsulo zokhala ndi martensitic (zotchulidwa motere monga zitsulo za martensitic), zitsulo za chrome ndi Metal Matrix Composites (MMC, egceramic), momwe zitsulo zosiyanasiyana ...
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