The normally open fire door should be used for the fire door set in the building where people often pass. Except where normally open fire doors are allowed to be set, normally closed fire doors shall be used for fire doors at other locations. Fire doors are fire compartments with certain fire resistance, such as fire compartments, evacuation staircases and vertical shafts.

ZHTdoors magonhi emoto, 31 makore ekugadzira ruzivo mumagonhi emoto uye Windows. Iyo huru UL magonhi emoto, EN magonhi emoto, BS EN magonhi emoto, nezvimwewo, .Tine certification.ZHTdoors inotsigira OEM uye yemahara design.Our zvakanakira: kunaka kwakanaka, mutengo wefekitari, basa rakanaka.Welcome to consult us.