Yong’in eshiklari uchta yong’inga chidamlilik darajasiga bo’linadi, A, B, C va turli darajadagi yong’inga chidamlilik vaqti boshqacha. Biz bilan maslahatlashish uchun xush kelibsiz.

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yong’inga chidamli metall eshik,er-xotin po’latdan yasalgan tashqi yong’inga qarshi eshik,eshik qishki yong’in oyna panjur,3 soat yong’inga chidamli eshik,yong’inga chidamli eshik uchun tutqichlar,yong’inga chidamli metall eshik,120 daqiqa yong’inga chidamli eshik,er-xotin po’latdan yasalgan tashqi yong’inga qarshi eshik,metall po’latdan yasalgan yong’inga qarshi eshikli kontrplak,3 soat yong’inga chidamli eshik,yong’inga chidamli havo o’tkazmaydigan eshik,yong’inga chidamli metall eshik,yong’inga chidamli eshik 900 * 2100,er-xotin po’latdan yasalgan tashqi yong’inga qarshi eshik,ichki yong’in tezligi metall eshiklari,3 soat yong’inga chidamli eshik