Bino yong’inga uchraganda, bitta yong’inga qarshi shisha eshik taxminan yarim soatlik yuqori haroratga bardosh bera oladi, bir soat yoki undan ko’proq vaqt o’tgach, shisha asta-sekin yumshata boshladi, shuning uchun uning yong’inga qarshi qobiliyati nisbatan ajoyib.

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