Yong’in sodir bo’lganda, yong’inga qarshi eshikning muhrlangan tasmasi eshikning yorilishini blokirovka qilish va ikki bo’shliq orasidagi havo aylanishini kesish uchun avtomatik ravishda kengayadi, erta tutun, zaharli gaz va issiq gazning inson tanasiga zarar etkazishini samarali oldini oladi va tarqalishini nazorat qiladi. olovdan.

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