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• 한국의 실내에서의 라돈농도 세계 2위 Radon Levels in South Korean Homes are 2nd Highest in the WorldPosted November 20, 2013 by Pristine Home Inspections As the cause of 21,000 deaths each year in the U.S., radon gas is a carcinogen that is officially blog.naver.com · 2018.06.08