The fire resistance time of Class A fireproof door is up to 1.5 hours. The internal horizontal and vertical frames of the door leaf are reinforced, effectively preventing the door leaf from being deformed by heat. The interior of the fire door leaf is filled with dense fire-retardant cloth faced perlite fire-proof board, and all parts are filled fully.

ZHTdoors milango ya moto, miaka 31 ya uzoefu wa uzalishaji katika milango ya moto na Windows. Milango kuu ya moto ya UL, milango ya moto ya EN, milango ya moto ya BS EN, nk., Tuna certification.ZHTdoors msaada OEM na bure design.Our faida: ubora mzuri, bei ya kiwanda, huduma nzuri.Karibu kushauriana nasi.