Xov Xwm Tuam Txhab
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Peb yuav tuaj koom WEFTEC2016 hauv New Orieans USA
WEFTEC, Water Environment Federation's Annual Technical Exhibition and Conference, yog lub rooj sib tham loj tshaj plaws nyob rau 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 lees paub...Nyeem ntxiv
