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Development of an Air Duct Damper to Prevent Backflow Odor from the Ventilation Shaft in Buildings

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Nowadays. backflow odor. along with floor noise. has been recognized as an environmental right dispute element between the units within a multi-unit dwelling in Korea because it causes not only foul odors flowing back into the unit vent pipe to flow indoors and cause a problem of degraded air quality but also annoyance by foul odors and steam in balconies and bathrooms. https://countryscenesaddleryandpetsuppliers.shop/product-category/saddle-western-blanket/
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