Steel door frame is securely welded to the straps providing continuity to diaphragmatic action provided by straps. We do not use wood or plastic in our frames which can rot, twist or break within a few years and cause poor door sealing.
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Steel door frame is securely welded to the straps providing continuity to diaphragmatic action provided by straps. We do not use wood or plastic in our frames which can rot, twist or break within a few years and cause poor door sealing. |
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