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2019 공기여과수단을 갖는 버스정류장(10-1988299)
2019 미세먼지 관리 시스템(10-2019-0049941)
2019 개방공간용 공기정화장치(10-1964903)
2018 공기정화기를 갖는 개방형 흡연부스(10-2018-0169084)
2017 집진장치(10-1699904)
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