Bayanan martaba na ƙarfe, kamar yadda sunan ya nuna, ƙarfe ne tare da wani nau'i na geometric, wanda aka yi da karfe ta hanyar birgima, tushe, jefawa da sauran matakai. Domin biyan bukatu daban-daban, an sanya shi cikin sassa daban-daban kamar su I-karfe, H karfe, Ang...
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