Po’latdan yasalgan yong’in eshigi yaxshi havo o’tkazmasligiga ega va yopilishi joyida va qattiq. Kasnaklar va relslar kabi aşınmaya bardoshli qismlar yuqori sifatli uskuna bo’lib, ular mahsulotning xizmat qilish muddatini ta’minlash uchun qattiq sinovdan o’tgan. Chelik yong’inga qarshi eshiklar turli xil ranglarda bo’ladi, eng keng tarqalgan oq rang, oddiy va hurmatli.

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