Bututun ƙarfe shine aikin bututun iskar gas da aka fi amfani dashi. Babban fa'idodinsa shine: ƙarfin ƙarfi, ƙaƙƙarfan ƙarfi mai ƙarfi, ɗaukar damuwa, juriya mai ƙarfi da ƙarfi, filastik mai kyau, walƙiya mai sauƙi da sarrafa zafin jiki, kauri na bango yana da ƙarfi, ceton ƙarfe. Amma rashin juriya na lalata, yana buƙatar h ...
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