由中国机械工程学会铸造学会铸铁及熔炼专业委员会主办，河南省铸造学会、河南省铸锻协会和河南省铸锻工贸公司协办的“全国提高出口铸件质量专题研讨会”1993年10月5日～8日在郑州召开，来自全国工厂、学校、科研院所、进出口公司等69个单位、95人出席了会议。北京农业工程大 By the Chinese Mechanical Engineering Society Foundry Society of Casting and Melting Professional Committee sponsored by the Foundry Society of Henan Province, Henan Province, casting and Forging Association and Henan forging Industry and Trade Company co-sponsored the “National Outstanding casting quality improvement seminar” October 5, 1993 ~ 8th held in Zhengzhou, from factories, schools, research institutes, import and export companies 69 units, 95 people attended the meeting. Beijing Agricultural Engineering