| BTU |
British Thermal Unit. .
출처: www.allaboutdoors.com/article_info.php/articles_id...
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| BTU |
A British thermal unit is a unit of energy required to raise the temperature of 1 pound of water 1 o C. An average residential gas customer consumes about 100 million Btu per year.
출처: www.fuelingthefuture.org/contents/glossary.asp
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