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drilling hydraulics
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drilling hydraulics
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钻孔冲洗
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drilling hydraulics
钻探水力学
用水力学和钻井液流变学的原理,研究钻孔内钻井液流动状况和规律的学科。用以解决钻孔内的排除岩屑、冷却钻头、水功率利用、优化钻探等实际问题。
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"Government Service Supermarket" in Xiamen City
government social combination sports system
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Government's White Paper of China
government system adopted by south-based goverments
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