한국소비자원 2020-06-16T01:36:06Z 2020-06-16T01:36:06Z 2019-12-05 2019-12-05 1002871297 https://www.kca.go.kr/eng/sub.do?menukey=6007&mode=view&no=1002871297 https://www.kca.go.kr/repo/handle/2015.oak/6270 한국소비자원 http://creativecommons.org/licenses/by-nc-nd/2.0/kr/ Air purifiers vary in performance, including toxic gas removal (deodorization) efficiency and noise level news