为帮助金相检验人员正确地使用、掌握有关金相检验的标准,在江苏省机械科学研究所及省理化分会的主持下,于1983年10月15～30日在南通举办了第二次金相标准学习班。学习班讲授了17个金相标准,参加学习 In order to help metallurgical inspectors correctly use and master the standards of metallographic examination, under the auspices of Jiangsu Provincial Institute of Machinery Science and provincial physical and chemical branch, the second gold was held in Nantong from October 15 to October 30, 1983 Standard class. The class taught 17 gold standards, to participate in learning