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optimum design for rod pumping system
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optimum design for rod pumping system
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工学
有杆泵油井抽油系统优化设计
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optimum design for rod pumping system
有杆泵抽油系统优化设计
选择机、杆、管以及抽汲参数,并预测其工况指标,使整个系统高效率、安全工作的过程。
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early warning
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early-warning of Geological hazard based on meteorological factor
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early-warning system
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early winter disaster of wheat
early wither of wheat on hot days after rain
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earmuffs cap
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