Ƙunƙarar kusoshi, wanda kuma aka sani da kusoshi na ƙarfe, wani nau'in kusoshi ne na musamman da aka yi da karfen carbon. Wadannan kusoshi suna da tsauri saboda kayan da ake amfani da su, wanda shine karfe 45 # ko karfe 60 #. Suna gudanar da wani tsari na zane, cirewa, ƙusa, da kuma kashe su, wanda ya haifar da st ...
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