Po’latdan yasalgan yong’inga chidamli eshik, kerak bo’lganda, deraza, panjur, ventilyatsiya panjasi va boshqalar bilan ta’minlanishi mumkin. Po’latdan yasalgan yong’inga qarshi eshiklarning turli xil yong’inga chidamliligiga ko’ra, ularning yong’inga chidamliligi uchta sinfga bo’linishi mumkin: A, B va C.

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