Txhawb nqa los ntawm Steel Pipe Ceg ntawm Tuam Tshoj Steel Structure Association (CSPA) thiab tuav los ntawm Tianjin Youfa Steel Pipe Group, 2021 Steel Pipe Export Symposium tau ua tiav hauv Tianjin rau hnub tim 16 Lub Xya Hli.
Tom qab sib ntsib, cov neeg sawv cev ntawm 2021 steel yeeb nkab xa tawm symposium mus xyuas Tianjin Youfa Steel Pipe Group rau hnub tim 17 Lub Xya Hli.
Lub sijhawm tshaj tawm: Lub Xya Hli-17-2021