大部分的抽油机因为有减速机，使系统整体存在传动效率低与电机工作效率低两方面问题，而从驱动控制等方面都无法从根本上解决这些问题。
Most of the pumping units have the characteristic of poor performance transmission efficiency, energy-intensive, and the motor power factor is low. They can not satisfy the need of the Wells.
大部分的抽油机因为有减速机，使系统整体存在传动效率低与电机工作效率低两方面问题，而从驱动控制等方面都无法从根本上解决这些问题。
Most of the pumping units have the characteristic of poor performance transmission efficiency, energy-intensive, and the motor power factor is low. They can not satisfy the need of the Wells.
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