Do you know it? "Coal Briquette" that only Koreans know.

It's a kind of briquette for heating. It's called 'Yeontan'. The main ingredient is anthracite. It is usually used by overlapping two up and down. You know the famous "Ondol" system in Korea? The heat efficiency is really good. It's "Briquette" that's disappearing now.

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Видео Do you know it? "Coal Briquette" that only Koreans know. канала KoreaNow21