"Yaochi a cikin sama, Yuechi a cikin ƙasa."Cibiyar kula da najasa ta gari a gundumar Yuechi, birnin Guang'an na amfani da mita pH, mita ORP, narkar da mita oxygen, mitar maida hankali, na'urar lantarki na lantarki da sauran kayayyaki don gane gano mahimman alamomi a cikin aiwatar da aikin kula da najasa na cikin gida.
