The fireproof materials filled in the steel fireproof door leaf are environment-friendly and pollution-free. The surface treatment process of the door leaf is powder spraying or PVC coating, which are mature environment-friendly processes. According to the different fire resistance of steel fire doors, their fire resistance can be divided into three grades: A, B, and c. Steel fire doors of different grades can be used in various places.

ZHTdoors باھ جا دروازا، 31 سالن جي پيداوار جو تجربو فائر دروازن ۽ ونڊوز ۾. مکيه UL باھ جا دروازا، EN باھ جا دروازا، BS EN باھ جا دروازا، وغيره. اسان وٽ سرٽيفڪيشن آھي. ZHTdoors OEM ۽ مفت ڊيزائن جي حمايت ڪن ٿا. اسان جا فائدا: سٺو معيار، فيڪٽري قيمت، سٺي خدمت. اسان سان صلاح ڪرڻ لاء ڀليڪار.