Basedontheengineeringpracticeandaccordingtotherelatedliterature,the paperdiscussedthetechnicalissuesinDTHdrilling. 以工程实践为依据,参考有关文献,对气动潜孔锤钻进中的若干技术问题进行了论述,以期促进该技术的推广应用。 lib.cqvip.com 8. Higher
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