Kaca fireproof ing lawang fireproof wis resistance geni dhuwur, kang bisa diobong ing semangat, lan bisa entuk efek saka blasting lan ora leleh ing wektu tartamtu. Kekerasan kaca saka lawang geni yaiku 6 ~ 12 kaping kaca float lan 2 ~ 3 kaping kaca tempered.

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