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| Global Geology
2011 14 (4):
259-264
ISSN: 1673-9736: CN: 22-1371/P |
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| Reverse Circulation DTH Hammer Drilling Technique |
| BO Kun, YIN Kun and PENG Jianming |
| College of Construction Engineering，Jilin University，Changchun 130026，China |
| Received null Revised null Online 2011-12-25 |
| Reference |
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| Corresponding author: |
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