LI Wan-hao
School of Mechanical Engineering, Hebei University of TechnologyDUAN Guo-lin
School of Mechanical Engineering, Hebei University of TechnologyXU Hong-jing
School of Mechanical Engineering, Hebei University of TechnologyMA Hong-yue
Hebei Jiankan Drilling Equipment Co., Ltd.ZHANG Xi-kun
Hebei Jiankan Drilling Equipment Co., Ltd.School of Mechanical Engineering, Hebei University of Technology,School of Mechanical Engineering, Hebei University of Technology,School of Mechanical Engineering, Hebei University of Technology,Hebei Jiankan Drilling Equipment Co., Ltd.,Hebei Jiankan Drilling Equipment Co., Ltd.
P634.3 4