pump efficiency improvement
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pump efficiency improvement
泵效率提高
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 results show that the improvement of the slant improved oil-well pump 's internal structure and the optimization of the materials are the main factors to improve pump efficiency.
研究结果表明改进型斜井泵的内部结构的改进和材质的优选是泵效提高的主要因素。
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