The thickness of steel fire door leaf is divided into three standards, namely, Party A, Party B and Party C, with excellent sound insulation and heat insulation performance. Steel fire door hinges, locks, door closers and other vulnerable parts are of high quality, light and durable.

ZHTdoors yong’inga qarshi eshiklar, yong’in eshiklari va derazalarida 31 yillik ishlab chiqarish tajribasi. Asosiy UL yong’in eshiklari, EN yong’in eshiklari, BS EN yong’in eshiklari va boshqalar.