1 янв 1902 г. - air conditioning

Описание:

air conditioning changed many peoples lives. without this, many people lived in heat as they slept in their houses, constantly sweating, trying to get comfortable. air conditioning sucked out the hot air, turned it to cold, then blew it back in.

https://www.historylearningsite.co.uk/inventions-and-discoveries-of-the-twentieth-century/inventions-1900-to-1990/

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