WEFTEC, Water Environment Federation's Annual Technical Exhibition and Conference, yog lub rooj sib tham loj tshaj plaws ntawm nws cov hom hauv North America thiab muaj ntau txhiab tus kws tshaj lij dej zoo los ntawm thoob plaws ntiaj teb cov dej zoo tshaj plaws kev kawm thiab kev cob qhia muaj hnub no.Kuj tseem lees paub tias yog lub ntiaj teb loj tshaj plaws txhua xyoo kev ua yeeb yam dej zoo, WEFTEC cov yeeb yam loj hauv pem teb muab kev nkag mus rau thaj chaw cov thev naus laus zis thiab kev pabcuam tshaj plaws.
Post lub sij hawm: Aug-14-2013