Juriyar wuta ta kofofin wuta na karfe daban-daban, kuma juriyar wutar su za a iya raba su zuwa maki uku: A, B, da C. Ana iya amfani da kofofin wuta na karfe daban-daban a wurare daban-daban. Yawancin fa’idodin ƙofofin wuta na ƙarfe ya sa su mamaye babban kaso na kasuwa a gine-ginen jama’a.

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