UL fireproof qhov rooj tuaj yeem ua tau raws li qhov yuav tsum tau muaj kev tiv thaiv hluav taws, kev ncaj ncees thiab thermal rwb thaiv tsev nyob rau qee lub sijhawm. Nws yog siv hauv North America thiab lwm lub tebchaws thiab cheeb tsam uas tau lees paub UL cov qauv. Sib txawv ntawm lwm qhov hluav taws kub qhov rooj, American standard fire doors are obviously characterized by that American standard fire doors need to pass the fire water strike test.

ZHTdoors hluav taws qhov rooj, 31 xyoo ntawm kev tsim khoom hauv qhov rooj hluav taws thiab qhov rais. Lub ntsiab UL qhov rooj hluav taws, EN qhov rooj hluav taws, BS EN qhov rooj hluav taws, thiab lwm yam.,.Peb muaj ntawv pov thawj.ZHTdoors txhawb OEM thiab tsim dawb.Our zoo: zoo zoo, Hoobkas nqi, kev pabcuam zoo.Zoo siab txais tos los tham nrog peb.