Yuav ua li cas xaiv cov kav hlau
Qhov tseem ceeb ntawm cov khoom siv kuaj
Cov neeg siv khoom xaj kom muaj nuj nqis
Qhov sib txawv ntawm Huayang submerged arc welded steel yeeb nkab thiab zoo tib yam steel yeeb nkab
Qhov tseem ceeb ntawm cov khoom siv kuaj


Cov neeg siv khoom xaj kom muaj nuj nqis

Qhov sib txawv ntawm Huayang submerged arc welded steel yeeb nkab thiab zoo tib yam steel yeeb nkab


