1983年4月22~24日机械工业部重型矿山机械局和机械科学研究院在沈阳主持召开了由沈阳重型机器厂和沈阳铸造研究所联合攻关的采用无氮树脂砂铸造大型铸钢件—45吨重废钢打包机侧壁铸件和沈阳铸造研究所研制的大型铸钢件用的ZGS—4型和ZGS—5型无氮呋喃树脂鉴定会.来自我国十多个重机厂和大专院校 April 1983 22 ~ 24 Heavy Machinery Machinery Industry Machinery Industry Machinery and Machinery Research Institute in Shenyang chaired by the Shenyang Heavy Machinery Factory and Shenyang Foundry Institute jointly tackled the use of non-nitrogen resin sand casting large steel -45 Tons of heavyweight steel baler side wall castings and Shenyang Foundry Institute for the development of large castings ZGS-4 and ZGS-5 type nitrogen-free furan resin identification will come from China more than 10 heavy machinery plant and tertiary institutions