江苏南京矿山机械厂与上海电焊机厂合作研制的FN—250自动缝焊机于1989年6月6日在南京通过部级鉴定。 FN—250自动缝焊机是列入国家1985～1987年50项重大科技开发项目之一,该焊机在引进英国FederalDW250—6自动缝焊机基础上消化、吸收自行开发,立足国内而 FN-250 automatic seam welder developed by Jiangsu Nanjing Mining Machinery Factory and Shanghai Welding Machine Factory passed ministry-level appraisal in Nanjing on June 6, 1989. FN-250 automatic seam welder is included in the country from 1985 to 1987, 50 major science and technology development projects, the welder in the introduction of the British FederalDW250-6 automatic seam welder based on digestion and absorption of self-development, based on domestic