1.China University of Geosciences (Wuhan), WuhanHubei430074, China;2.Qinghai Provincial Second Geological Exploration Institute, XiningQinghai810003, China;3.Qinghai Province Core Drilling Engineering Technology Research Center, XiningQinghai810003, China;4.Qinghai Coal Geology 105 Exploration Team, XiningQinghai810006, China
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