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Lokacin juriyar wuta na Class A Ƙofar wuta ta ƙarfe bazai ƙasa da sa’o’i 1.5 ba. Ciki na Ƙofar Wuta ta Class A gabaɗaya perlite ce, tare da ƙaramin adadin kayan gyara kamar allon wuta na vermiculite, allon ƙofar kumfa, kayan yarda da MC, da sauransu.

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