Ib lub taub hau hluav taws xob cua sov tube 321 stainless hlau raj.

Seamless steel kav (GB14976-2002) yog cov khoom siv zoo carbon steel siv los tsim cov kav dej superheated, cov kav dej kub thiab cov kav dej kub ntawm ntau yam qauv, xws li cov kav dej superheated, cov kav dej loj, cov kav dej me me thiab cov kav dej. cib kav. Kub dov thiab txias kos (dov) seamless steel hlab.