2023, Vol. 26(2): 114-121    DOI:
 Discussion of reasonable drilling parameters in impregnated diamond bit drilling
 PAK Kumdol1,2, HO Yinchol3 , PENG Jianming2* , RI Jaemyong1 and HAN Changson1
 1. School of Resource Exploration Engineering, Kim Chaek University of Technology, Pyongyang 999093, D.P.R. Korea;
2. College of Construction Engineering, Jilin University, Changchun 130026, China;
3. School of Information Science and Technology, Kim Chaek University of Technology, Pyongyang 999093, D.P.R. Korea
Received null  Revised null
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