pumping units的用法和樣例：
例句
- To provide a basis for precise calculation of pumping Unit, it is necessary to make a elastodynamic analysis on the u-nit.
要對抽油機的設計提供較為精確的理論計算依據，必須對抽油機進行彈性動力分析。 - This paper mainly focuses on the fluctuation of velocity and torque of the electromotor because of the variational load in the pumping unit equipment.
摘要抽油機中載荷變化大，易引起電動機轉速和轉矩的波動。
