华北地质勘查局第四地质大队,华北地质勘查局第四地质大队
No.4 Geological Brigade, North China Geological Exploration Bureau,No.4 Geological Brigade, North China Geological Exploration Bureau
庞少青,李国东.全液压动力头钻机存在的问题分析及改进建议[J].钻探工程,2014,41(2):64-66.PANG Shao-qing, LI Guo-dong. Analysis on the Problems of the All Hydraulic Dynamic Head Drill and the Suggestions for the Improvement[J]. Drilling Engineering, 2014,41(2):64-66.
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