Turli materiallar va funktsiyalarga ega yong’in eshiklari ehtiyojlarga qarab turli narxlarga ega. Yong’in eshiklarining eng muhim vazifasi – bu uch turga bo’lingan yong’in va issiqlik izolyatsiyasi ko’rsatkichlari: A, B va C. Biz bilan maslahatlashishga xush kelibsiz.

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