1. Seamless steel kav yuav muab faib ua cov kav dej kub dov, cov kav dej txias txias, cov kav dej txias txias, thiab cov kav dej extruded raws li cov txheej txheem ntau lawm.
2. Raws li cov duab, muaj cov raj puag ncig thiab cov raj tshwj xeeb. Ntxiv nrog rau cov raj square thiab cov kab plaub hau, cov raj tshwj xeeb zoo li muaj xws li oval raj, semicircular raj, daim duab peb sab, hexagonal raj, convex-shaped leeg, plum-puab raj, thiab lwm yam.
3. Raws li cov ntaub ntawv sib txawv, nws tau muab faib ua cov pa roj carbon zoo tib yam yeeb nkab, cov yeeb nkab uas tsis tshua muaj hlau, cov yeeb nkab zoo carbon zoo, cov qauv hlau yeeb nkab, cov yeeb nkab steel hlau, thiab lwm yam.
4. Raws li lub hom phiaj tshwj xeeb, muaj boiler raj, geological raj, roj raj, thiab lwm yam.
