20钢无缝管表面缺陷成因分析
姜碧涛,闫卫兵,林腾昌
Causes analysis of surface defect on 20 seamless steel pipe
JIANG Bi-tao,YAN Wei-bing,LIN Teng-chang
中国钢铁期刊网 . 2015, (5): 43 -47 .  DOI: 10.13228/j.boyuan.issn1001-0777.20150002