1. Bakin karfe abu gabatarwar Bakin karfe wani nau'i ne na kayan ƙarfe mai jurewa, wanda ya ƙunshi baƙin ƙarfe, chromium, nickel da sauran abubuwa, tare da kyawawan kayan aikin injiniya, tauri, filastik da juriya na lalata.Fil na chromium oxide ...
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