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Earlier issues
2009, Vol. 12(1): 36-39    DOI:
Study on drilling mechanism and optimization of percussion-extruding DTH hammer bit
LUO Chunhong, ZHENG Zhichuan and CAO Pinlu
College of Construction Engineering, Jilin University, Changchun 130026, China
Received null  Revised null
Supporting info
sponsored by:International Center for Geoscience Research and Education in Northeast Asia, Jilin University
ISSN 1673-9736
CN 22-1371/P
Address:No.938 Ximinzhu Street, Changchun 130026,China
TEL: 0431-88502587
E-mail: sjdz@jlu.edu.cn
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