Po’lat yong’inga qarshi eshik yaxshi havo o’tkazuvchanligiga ega va yoriq qoldirmasdan juda qattiq yopiladi, bu esa konditsionerlik va isitishning toshib ketishiga imkon beradi. Chelik yong’in eshigi ochilganda, faqat 1KG kuch talab qilinadi va ochilish kuchlanishi 50N dan kam. Hatto nogironlar aravachasidagi odamlar ham uni osongina ochishlari mumkin.

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