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Crack defect analysis of 40CrMnMo steel drill pipe material
Zhong Bin, Chen Yiqing, Meng Fanlei, Gao Peng, Ai Fangfang, Li Lin, San Hongyu
Heat Treatment of Metals . 2021, (
2
): 228 -231 . DOI: 10.13251/j.issn.0254-6051.2021.02.043