根据国务院“科学技术要为国民经济服务”的指示精神,机械工业部沈阳铸造研究所、昆明冶金机械厂、鸡西柳毛石墨矿于一九八三年十二月七日至二十七日在昆明主办“铸钢件保温冒口工艺推广应用学习班” According to the directive of the State Council on “science and technology should serve the national economy”, the Shenyang Foundry Research Institute of the Ministry of Machinery Industry, Kunming Metallurgical Machinery Factory, and the Jixi Liu Mao Graphite Mine were held from December 7 to August 27, 1983 Kunming hosted “steel casting riser technology to promote the application of classes”