Lawang geni baja bisa diwenehake karo jendhela kaya sing dibutuhake, lan kaca ing lawang geni kudu kaca tahan geni. Kaca tahan api ing lawang baja tahan api kanthi jendhela digawe saka kaca ngambang sing berkualitas tinggi sawise reaksi fisik lan kimia. Bisa diobong ing geni, lan entuk efek ora ana blasting lan ora leleh sajrone wektu tartamtu.

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