易切削钢银亮棒表面圆坑缺陷分析

余国松，余其中

Analysis of round pit defects on surface of silver bar made from free-cutting steel

YU Guo-song， YU Qi-zhong

中国钢铁期刊网 . 2016, (2): 47 -51 . DOI: 10.13228/j.boyuan.issn1001-0777.20150046