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| 2018, Vol. 55(4): 9-13 DOI: | ||
| Development and Application of Rock-Drilling Equipment in China | ||
| (1 China Railway Yanfeng Chengdu Science and Technology Co. Ltd., Chengdu 611731; 2 China Railway Southwest Research Institute Co. Ltd., Chengdu 611731) | ||
| Received null Revised null | ||
| Supporting info | ||
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