Kayan aikin kayan aikin na nufin ƙarfe, ƙarfe, aluminum da sauran karafa ta hanyar ƙirƙira, kalandar, yankewa da sauran sarrafa jiki, ƙera su zuwa na'urorin ƙarfe iri-iri. Akwai nau'ikan kayan aikin hardware da yawa, gwargwadon yadda ake amfani da samfuran don rarraba, ana iya raba su zuwa kayan aikin kayan aiki, ...
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