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| 2014, Vol. 37(9): 120-121 DOI: | ||
| Research and Practice of Coal Seam Fracture Zone with Low Permeability and Difficult Pump Borehole Extraction Effect | ||
| LUO Chen-hui | ||
| Sima Mining Industry Corporation Ltd., Lu’an Group, Changzhi 047105, China | ||
| Received null Revised null | ||
| Supporting info | ||
| null | ||
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