The paper mainly introduces the application that the high voltage inverter in the oil fieldpump and joint electricity effect is clear, and possesses application and dissemination value.
本文叙述了高压变频器在油田注水泵上的应用，节电效果明显，具有推广应用价值。
2
Crucially, though, the demon need pump no energy into the rotor, only information about the position of the rotor, which it USES to switch the field.
至关重要的是妖魔并没有把能量提供给转子，只是用了转子自己位置的信息，它被用来切换电场。
3
Field application demonstrates that the management level and economic efficiency of the screw pump production system would be improved by using the control chart.