"Yaochi saum ntuj, Yuechi hauv ntiaj teb".Lub tsev kho mob dej phwj hauv nroog hauv Yuechi County, Guang'an City siv peb lub ntsuas pH, ORP meter, yaj oxygen meter, sludge concentration meter, electromagnetic flowmeter thiab lwm yam khoom kom paub txog kev tshawb nrhiav cov cim tseem ceeb hauv cov txheej txheem ntawm kev kho dej phwj nyob deb nroog.
