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Gas-shielded Solid Vuam Hlau
Qhia peb cov kev hloov pauv roj-Shielded Solid Vuam Hlau, zoo meej rau txhua yam koj xav tau vuam.Tsim nyob rau xyoo 1950, CO2 roj-shielded vuam tam sim no tau dhau los ua qhov tseem ceeb fusion vuam txheej txheem, dav siv nyob rau hauv ob peb lub teb xws li tsheb kev lag luam, kev tsim machinery manufacturing, shipbuilding, metallurgy khoom manufacturing, txuas hniav, kaum kev tsim kho tej yaam num, petrochemical kev lag luam, boiler thiab kev tsim cov hlab ntsha siab, dov Tshuag, thiab lwm yam.
