Gabatarwa: Barka da zuwa duniyar ƙwallayen ƙarfe, inda daidaito da daidaituwa ke haɗuwa da ƙarfi da dorewa.A cikin wannan rukunin yanar gizon, za mu bincika fannoni daban-daban na ƙwallon ƙarfe, gami da rarrabuwar su, kayan aiki, da aikace-aikacen gama gari.A matsayin daya daga cikin manyan masana'antun masana'antu ...
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