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| 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 | ||
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