yong’in eshigi va yong’in chiqishi, po’lat yong’in chiqishi, 6 panelli yong’inga qarshi eshik 44 mm

Yong’in eshiklari navbati bilan A, B va C darajalariga ega va ularning yong’inga chidamliligi chegarasi mos ravishda 120 daqiqa, 90 daqiqa va 60 minut. Yong’in eshiklari – yong’inga qarshi zinapoyalarning yong’inga qarshi yaxlitligini saqlash va qochish vositalarini ta’minlash uchun ishlatiladigan eshiklar.

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