Lub Tebchaws Netherlands Aquatech Amsterdam 2019 Kev Ncaj Ncees Dej Thoob Ntiaj Teb

2019.11.5th-8th: Wasinex ntawm Netherlands Aquatech Amsterdam 2019 Kev Kho Dej Thoob Ntiaj Teb hauv chav RAI Exhibition Center, lub rooj muag zaub No. 12.809