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