Farcen siminti, wanda aka fi sani da ƙusa na ƙarfe, ƙusa ne, yin amfani da samar da ƙarfe na carbon, abu yana da ƙarfe 45 ko karfe 60, bayan zanen waya, shafewa, yin ƙusa, quenching da sauran matakai, don haka rubutun yana da wuyar gaske.Ayyukansa shine ƙusa wasu ƙusoshin wasu ƙananan kusoshi akan ...
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