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Anyang Saemul Park, Korea's First Underground Sewage Treatment Plant
Source : cnews.co.kr
Article : http://www.cnews.co.kr/uhtml/read.jsp?idxno=201712111611328380290
Source : cnews.co.kr
Article : http://www.cnews.co.kr/uhtml/read.jsp?idxno=201712111611328380290