UL fireproof doors have been proved to be fireproof tested by the door components in the fire test conducted according to the standards, to ensure their fire performance characteristics as fireproof doors. American standard fire door, wh certificate based on ul standard, with 20-180 minute fire certificate.

ZHTdoors albaabbada dabka, 31 sano oo waayo-aragnimo wax soo saar ah oo albaabbada dabka iyo Daaqadaha. Albaabada dabka UL ee ugu muhiimsan, albaabada dabka EN, BS EN albaabbada dabka, iwm.