Nau’in layi na firam ɗin ƙofar wuta da fan ya kamata ya dace da buƙatun ƙira, kuma sassan da aka yanke da haɗin gwiwa ya kamata su kasance masu tsauri da santsi. Fuskar ƙofar wuta za ta kasance mai tsabta ko sanyi, kuma ba za ta kasance ba tare da alamun shirin ba, bursu da alamun guduma.

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