The surface treatment process of steel fire doors is more diverse. Besides, steel fire doors can be filled with a variety of fireproof materials, which have good fire and smoke prevention capabilities, as well as sound insulation, and are more suitable for schools, hospitals and other places that are very sensitive to noise.

ZHTdoors pòt dife, 31 ane eksperyans nan pwodiksyon nan pòt dife ak fenèt yo. Pwensipal UL dife pòt yo, EN dife pòt yo, BS EN dife pòt yo, elatriye,.Nou gen certification.ZHTdoors sipòte OEM ak konsepsyon gratis.Avantaj nou yo: bon kalite, pri faktori, bon sèvis.Byenveni pou konsilte nou.