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closeup view from inside the galvanized steel air duct on the exhaust fan in the background light, the front and back background is blurred with a bokeh effect
hvac services - worker install ducted pipe system for ventilation and air conditioning in house
Pile of pipes and parts for duct systems. Industrial ventilation
Doctors in protective suits put on a ventilation mask on a sick man with coronavirus disease covid-19, who is in an intensive care unit in a modern hospital.
Pile of pipes and parts for duct systems. Industrial ventilation

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Palm frondsImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/palm-fronds-943104">Image used under license from Freestock.com</a>
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