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1986年10月28日,在安徽省机械厅主持下,金属型复砂铸造球铁曲轴工艺的研究与应用攻关项目通过省级鉴定.
October 28, 1986, under the auspices of the Anhui Provincial Department of Machinery, the metal composite sand casting ductile iron crankshaft process research and application of key projects passed the provincial appraisal.