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sponsored by:
International Center for Geoscience Research and Education in Northeast Asia, Jilin University
ISSN 1673-9736
CN 22-1371/P
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Study on drilling mechanism and optimization of percussion-extruding DTH hammer bit
LUO Chunhong, ZHENG Zhichuan and CAO Pinlu
J4 . 2009, (
1
): 36 -39 .
