Yong’in eshigi oddiy eshiklarning rolidan tashqari, ko’proq yong’in tarqalishining oldini olish rolini o’ynaydi. Yong’in sodir bo’lganda, zinapoyadagi yong’in eshigi ma’lum bir vaqt ichida otashinlarning kirib kelishi, tarqalishi va tarqalishiga to’sqinlik qilishi mumkin, yong’in chiqishi qimmatli vaqtni yutib olishi uchun odamlarning hayoti va mulkiy xavfsizligini himoya qilish uchun yong’indir. qutqaruvchi eshik.

3070 hollow metal door,yong’in eshigi va oddiy eshik, yong’inga chidamli eshik tepish plitasi,door stopper for metal door,28 metal door,

yong’inga chidamli eshik ishlab chiqaruvchisi,3070 hollow metal door,yong’inga chidamli asosiy eshik, yong’inga chidamli eshik materiali,door stopper for metal door,yong’inga chidamli eshik qalinligi, temir eshik x, yong’inga chidamli eshik 2 soat, yong’inga chidamli eshik 90 daqiqa,28 metall eshik,

yog’och yong’inga qarshi eshiklar,3070 hollow metal door,metall eshik 36 x 80, yong’inga chidamli eshik ul, yong’inga chidamli eshik turar-joy