Lub Rooj Sib Tham ntawm 47th Txheej Txheem Tshwj Xeeb ntawm UNECE Tshwj Xeeb Tshwj Xeeb rau ntawm Qos Yaj Ywm
Thaum Lub Rau Hli 25 thiab 26, 2020, lub rooj sib tham hauv online ntawm plaub caug xya lub rooj sib tham ntawm Cov Txheej Txheem Tshwj Xeeb rau Kev Txhim Kho Cov Qauv tau muaj ...