Open Access Library Journal

Open Access Library Journal

ISSN Print: 2333-9705
ISSN Online: 2333-9721
www.scirp.org/journal/oalibj
E-mail: service@oalib.com
"Study of Load Fluctuation Characteristics of PDC Bit during Gas Extraction Borehole in Soft Coal Seam"
written by Shifeng Wang, Xiaoming Han, Qiangqiang Zhang,
published by Open Access Library Journal, Vol.4 No.6, 2017
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