Chengdu Pujiang County Kev Kho Dej Dej Dej Cog tau tsim hauv xyoo 2018, thiab cov nroj tsuag tau txais kev kho oxidation ntau dua.Nyob rau hauv oxidation ditch ntawm cov nroj tsuag, thawj fluorescent cap ntawm Hash II imported los ntawm lub tebchaws United States yog Ameslikas siv.Txawm li cas los xij, nws tau pom nyob rau hauv qhov sib piv tiag tiag ntawm qhov chaw uas qhov ntsuas tau ntawm peb cov fluorescence yaj oxygen meter yog qhov pib zoo ib yam li Hash.Tam sim no peb txoj kev fluorescence yaj oxygen meter tau ua tiav siv rau hauv cov dej phwj tuaj.
