Kvartiralarda yong’in xavfsizligi eshiklari, yong’in eshigini almashtirish narxi, 10-sonli yong’in eshigi

Yong’in eshiklari binoning bo’sh joyini bir nechta yong’in bo’linmalariga ajratadi, shuning uchun har bir yong’in bo’linmasida yong’in sodir bo’lganda, u yong’inni samarali nazorat qilish uchun ma’lum vaqt davomida tashqariga tarqala olmaydi. Po’lat yong’inga qarshi eshik yuqori quvvatga ega va yaxshi yong’inga qarshi ta’sirga ega.

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