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Po’lat yong’inga qarshi eshik po’latdan yasalgan ramka va temir eshik bargidan iborat. Po’lat strukturasi ta’sir deformatsiyasiga va tashqi kuchning shikastlanishiga moyil emasligini ta’minlashi mumkin va uzoq vaqt davomida almashtirilmasdan normal ishlatilishi mumkin. Ishlab chiqarish bosqichida temir yong’in eshiklarining jarayoni va sifatini tekshirish jarayoni juda qattiq, faqat shu tarzda ular sotilishidan oldin tekshiruvdan o’tishi mumkin.

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