Ƙofofin wuta da muke magana akai sune kofofin wuta na thermal insulation (watau Ƙofofin wuta na Ajin A), waɗanda zasu iya biyan buƙatun amincin wuta da kuma kariya ta thermal a lokaci guda a cikin ƙayyadaddun lokaci. Ƙofar wuta tare da ƙimar juriyar wuta da bai wuce awa 1.5 ba.

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