1: Cov yam ntxwv ntawm cov kav dej ncaj seam steel muaj cov txheej txheem tsim khoom yooj yim, kev ua haujlwm siab, tus nqi qis, kev loj hlob sai, thiab kev ua haujlwm zoo. Qhov zoo ntawm welded steel yeeb nkab khoom tuaj yeem muab piv rau seamless steel kav, txoj kev tsim khoom yog yooj yim, thiab nws yooj yim rau c ...
Nyeem ntxiv