“pumping unit dynamometer card”的概念、定义、翻译、参考文献-科学参考

单词	pumping unit dynamometer card
释义	pumping unit dynamometer card Encyclopedia 工学抽油机示功图释 pumping unit dynamometer card抽油机示功图由载荷随位移的变化关系曲线所构成的封闭曲线图。
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