防火門膨脹密封膠條
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$36
- 石墨膨脹材質，高溫自膨脹封堵縫隙
- 尺寸 10×4mm，可裁切，適合鋼質、木質防火門
- 防火等級 EI‑120，耐火 120 分鐘
- 用途：防火門防煙隔火密封，樓宇改裝工程
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