hydraulic percussion and rotary drilling
hydraulic percussion and rotary drilling
液压冲击和旋转钻井
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The percussion and rotary drilling of hydraulic impactor may heighten drilling velocity several times, when it is been applying in drilling geothermic well.
液动冲击器冲击回转钻进技术应用于地热井钻进中，可以数倍提高钻进速度。
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