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Yong’in eshiklarining asosiy maqsadi yong’inning oldini olish va kuchli yong’inga qarshilik ko’rsatishdir. Shuning uchun tanlangan materiallar yonish va yuqori haroratga juda chidamli bo’lishi kerak, nafaqat zaharli gazlarni o’z-o’zidan chiqarmaydi, balki zaharli gazlarning kirib kelishini yaxshi to’sib qo’yishi mumkin. Hammamizga ma’lumki, yong’inga qarshi eshiklar po’lat yong’inga qarshi eshiklar, yog’och yong’inga qarshi eshiklar, temir yog’och yong’in eshiklari va boshqa materiallarning yong’inga qarshi eshiklariga bo’linadi.

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