Class Ƙofar mai hana wuta ba zata iya kaiwa awa 1.5 kawai iyakar juriya na wuta ba, kuma ƙofar hana wuta kawai da aka yi ta tsari na musamman zai iya cika buƙatun juriya na awa 3. Ƙofar wuta ta sa’o’i 3 tana ɗaukar farantin karfe mai galvanized da bayanin martaba na bakin karfe da aka yi ta hanyar tsari na musamman azaman firam ɗin waje, wanda za’a iya amfani dashi azaman taga, amma ƙayyadaddun taga bai kamata ya zama babba ba.

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