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天津市电焊机厂研制成功的NBC8—250逆变CO_2焊机,于1987年11月6日在天津市机械管理局主持召开的鉴定会上通过鉴定。鉴定会认为这种焊机不但具备一般CO_2焊机
Tianjin welding machine factory successfully developed NBC8-250 inverter CO_2 welder, on November 6, 1987 in Tianjin Machinery Administration appraisal meeting chaired by the appraisal. Identification will think that this welder not only have a general CO_2 welder